TWI566980B - Control system of bicycle power generation apparatus - Google Patents

Description

Bicycle power generation control system

The present invention relates to a control system for a bicycle power generating device, and more particularly to a control system for a bicycle power generating device that can provide various operating modes for a user.

Nowadays, bicycles have become a common means of transportation and leisure for people in daily life. They can save energy and reduce carbon, and have the effects of leisure and relaxation and fitness.

However, users often cannot ride bicycles outdoors because of limitations such as weather, time and venue, which reduces the applicability of bicycles. In view of the above, the prior art provides a bicycle that can be seated indoors, which is a combination of a wheel body having a driving force and a bicycle power generating device. When the bicycle pedal is stepped on, the wheel body having the driving force can be used. The bicycle power generating device is operated to achieve the effects of exercise and energy-saving power generation at the same time.

Today's bicycle power generating devices use the frictional action principle. When the wheel of the bicycle rotates, it will receive a fixed resistance from the bicycle power generating device, so that the user can drive the wheel body to drive the bicycle power generating device to operate, thereby generating electricity. The purpose. However, the existing bicycle power generating device can only provide the resistance of the wheel body of the bicycle to realize the power generation function, so that the user can only experience a monotonous riding feeling when riding the bicycle, and the prior art cannot accurately simulate the user. a variety of riding experiences due to different terrain when riding a bicycle outdoors And the situation (such as when you need to step on the slope or climb downhill, you can slide without pedaling). In addition, when the two pedals of the bicycle are stepped on the horizontal line, since the component force of the user stepping on the pedal is small, the user needs to step on the pedal with a large pedaling force to drive the wheel body, so when the user is physically strong When descending, the pedal of the bicycle cannot be stepped on efficiently to drive the wheel of the bicycle to rotate.

The purpose of the present invention is to provide a control system for a bicycle power generating device that drives a permanent magnet synchronous motor in a sport mode or a taxi mode through a motor drive device to provide a more versatile ride mode for the user.

Another object of the present invention is to provide a control system for a bicycle power generating device that can dynamically compensate the pedal when the pedal is perpendicular to the horizontal line to provide a more convenient pedaling mode for the user.

Another object of the present invention is to provide a control system for a bicycle power generating device, which can activate a two-way power conversion device to achieve energy saving when the energy stored in the energy storage device reaches a predetermined value.

In order to achieve the above object, one of the more general embodiments of the present invention provides a control system for a bicycle power generating device, comprising: a permanent magnet synchronous motor, which is coupled with a wheel set of a bicycle and generates a rotational speed signal, and the permanent magnet synchronous motor operates on the hair. The motor mode or the motor mode; the operation interface sends a control signal according to the user's control; the control device is connected to the permanent magnet synchronous motor and the operation interface, generates a mode signal according to the speed signal and the control signal; the signal conversion device is connected to the control device, And receiving the mode signal and converting the mode signal into a motion mode signal or a coasting mode signal; and a motor driving device connected to the signal conversion device and the permanent magnet synchronous motor for driving the permanent magnet synchronous motor according to the motion mode signal or the taxi mode signal In the sport mode or the coasting mode; wherein, when the permanent magnet synchronous motor is driven in the sport mode, the permanent magnet synchronous motor operates in a generator mode, and the permanent magnet synchronous motor is driven by the power of the wheel of the bicycle to generate electric energy; When the permanent magnet synchronous motor operates in the coasting mode, the permanent magnet synchronous motor operates in the motor mode, and drives the permanent magnet synchronous motor operating in the motor mode through the electric energy of the city grid.

1‧‧‧Bicycle power plant control system

10‧‧‧ City Grid

11‧‧‧ Carrying frame body

12‧‧‧Roller

2‧‧‧ Permanent magnet synchronous motor

20‧‧‧Encoder

21‧‧‧ bicycles

21a‧‧‧ Wheel set

21b‧‧‧ pedal

3‧‧‧Operator interface

4‧‧‧Control device

41‧‧‧motion control device

411‧‧‧Control conversion circuit

411a‧‧‧gain conversion circuit

412‧‧‧Power compensation device

412a‧‧‧multiplier

412b‧‧‧Gain Regulator

412c, 422, 432‧‧‧ arithmetic circuits

413‧‧‧First switch

42‧‧‧Sliding control device

421‧‧‧Speed Command Generator

423‧‧‧Speed controller

43‧‧‧Switching device

431‧‧‧Low-pass filter

433‧‧‧hysteresis device

434‧‧‧second switch

5‧‧‧Signal conversion device

6‧‧‧Motor drive

7‧‧‧ energy storage device

8‧‧‧Two-way power conversion device

9‧‧‧Energy saving control device

ω‧‧‧Speed signal

ω ^* ‧‧‧ speed command signal

ωL‧‧‧ comparison signal

△ω‧‧‧ difference signal

△ωH‧‧‧ first preset value

△ωL‧‧‧ second preset value

C‧‧‧Control signal

Ssport‧‧‧ sport command signal

S _{sport1 ‧‧‧First} motion signal

Ssport2‧‧‧second motion signal

Sslide‧‧‧Sliding command signal

M‧‧‧ mode signal

Msport‧‧‧ sport mode signal

Mslide‧‧‧Sliding mode signal

Vdc‧‧‧Storage of electrical energy

V _dcH ‧‧‧ third preset

V _dcL ‧‧‧ fourth preset

FIG. 1A is a schematic structural view of a control system of a bicycle power generating device according to a preferred embodiment of the present invention.

1B is a system block diagram of a control system of a bicycle power generating device in accordance with a preferred embodiment of the present invention.

Fig. 2 is a functional block diagram of the control device of Fig. 1.

Figure 3 is a functional block diagram of the motion control device of Figure 2.

Fig. 4 is a schematic view showing the operation of power compensation of the control system of the bicycle power generating device of the present invention.

Fig. 5 is a detailed circuit block diagram of the control device of Fig. 2.

Fig. 6 is a schematic view showing the operation of the switch device of Fig. 2.

Figure 7 is a schematic view showing the operation of the two-way power conversion device of the control system of the bicycle power generating device in combination with the energy-saving control device according to another preferred embodiment of the present invention.

Some exemplary embodiments embodying the features and advantages of the present invention are described in detail in the following description. It is to be understood that the present invention is capable of various modifications in various aspects, and is not intended to limit the scope of the invention.

Please refer to FIG. 1 , which is a system block diagram of a control system of a bicycle power generating device according to a preferred embodiment of the present invention. The control system 1 of the bicycle power generating device of the present invention comprises a permanent magnet synchronous motor 2, an operation interface 3, a control device 4, a signal conversion device 5, a motor driving device 6, and an energy storage device 7. The permanent magnet synchronous motor 2 is interlocked with the wheel 21a having the driving force of the bicycle 21 to operate in synchronization with the wheel set 21a and generate the rotational speed signal ω, and the permanent magnet synchronous motor 2 can operate in the generator mode and the motor mode. The operation interface 3 provides a user setting the riding parameters to issue a control signal C, wherein the operation interface 3 can be, but not limited to, a touch operation interface or a button operation interface. The control device 4 is connected to the permanent magnet synchronous motor 2 and the operation interface 3 to receive the rotational speed signal ω and the control signal C, and detects the current rotational speed of the rotor of the permanent magnet synchronous motor 2 according to the rotational speed signal ω and the control signal C, and determines the user's position. Set the riding parameters, and then output the corresponding mode signal M. The signal conversion device 5 is connected to the control device 4 to receive the mode signal M, and converts and outputs the corresponding motion mode signal M _sport or the taxi mode signal M _slide according to the mode signal M, wherein the control device 4 and the signal conversion device 5 can be but not Limited to devices implemented with a microcontroller. The motor driving device 6 is connected to the permanent magnet synchronous motor 2 and the signal conversion device 5, and the motor driving device 6 operates the permanent magnet synchronous motor 2 in the motion mode according to the received motion mode signal M _sport or the coasting mode signal M _slide . Sliding mode. In the sport mode (for example, the user steps on the bicycle), the permanent magnet synchronous motor 2 operates in the generator mode, and in the coast mode (for example, the user stops pedaling), the permanent magnet synchronous motor 2 operates on the motor. Mode, wherein the motor drive 6 can be, but is not limited to, implemented in a three-phase full bridge circuit. The energy storage control device 7 is connected to the motor driving device 6 for storing the electric energy generated by the permanent magnet synchronous motor 2 operating in the generator mode as the stored electric energy V _dc , thereby providing the permanent magnet synchronous motor 2 in the motor mode. The electrical energy required for operation, wherein the energy storage control device 16 can be, but is not limited to, a capacitor. In some embodiments, the permanent magnet synchronous motor 2 further includes an encoder 20 configured to sense the rotational speed of the rotor of the permanent magnet synchronous motor 2 and emit a rotational speed signal ω.

In some embodiments, the control system 1 of the bicycle power generating device of the present invention can be configured as a bicycle trainer, wherein the bicycle trainer includes a carrier body 11 and a roller 12, wherein the carrier body 11 can carry the wheel set of the bicycle 21b, roller 12 series and bicycle wheel set 21b is interlocked, and the permanent magnet synchronous motor 2 is disposed in the roller 12, whereby the permanent magnet synchronous motor 2 can be interlocked with the pedal wheel set 21b.

Please refer to FIG. 2, which is a circuit block diagram of the control device of FIG. 1. The control device 4 includes a motion control device 41, a coasting control device 42, and a switching device 43, wherein the switching device 43 is connected to the motion control device 41 and the coasting control device 42. The motion control device 41 outputs a motion command signal S _sport to the switching device 43 based on the received control signal C. The coasting control device 42 outputs the coasting command signal S _slide to the switching device 43 based on the received rotational speed signal ω. The switching device 43 selectively selects one of the motion command signal S _sport and the coasting command signal S _slide as the mode signal M according to the rotational speed signal ω.

Please also refer to FIG. 3 and FIG. 4, wherein FIG. 3 is a circuit block diagram of the motion control device of FIG. 2, and FIG. 4 is a schematic diagram of the operation of the power compensation of the control system of the bicycle power generating device of the present case, wherein The upper half of Fig. 4 is the force applied graph of the pedal to the user, and the lower half of Fig. 4 is the operating stroke diagram of the pedal. The motion control device 41 includes a control conversion circuit 411. The control conversion circuit 411 outputs a corresponding first motion signal S _sport1 according to the received control signal C, that is, the riding parameter set by the user (for example, but not limited to the setting of the simulated gradient), so as to synchronize the permanent magnets. The motor 2 can provide the user with a more riding mode according to the gradient that the user wants to simulate.

In some embodiments, the motion control device 41 further includes a power compensation device 412 and a first switching element 413, wherein the power compensation device 412 is connected to the control conversion circuit 411, and the first end of the first switching element 413 is connected to the control. The output of the conversion circuit 411 or the output of the power compensation device 412, and the second end of the first switching element 413 is connected to the output of the motion control device 41. The user can select whether to activate the power compensation function when setting the riding parameters. When the user selects the function of turning on the power compensation, the power compensation device 412 of the motion control device 41 is based on the rotational speed signal ω emitted by the permanent magnet synchronous motor 2 Detecting the operating condition of the bicycle 21 outputs the second motion signal S _sport2 to the first switching element 413, and the first switching element 413 is selectively selected by the first motion signal S _sport1 and the second motion signal S _sport2 as Motion command signal S _sport . For example, when the pedal 21b of the bicycle 21 operated by the user (as indicated by the broken line in FIG. 4) is perpendicular to the horizontal line, since the arm of the pedal 21b that the user steps on is insufficient, the use is performed. At this time, it is difficult to step on the pedal 21b to operate it, and the first switching element 413 switches and selects the second motion signal S _sport2 outputted by the power compensation device 412 to dynamically compensate the permanent magnet synchronous motor 2 to The pedal 21b of the bicycle 2 can be easily stepped on by the user. When the pedal 21b of the bicycle 21 operated by the user is in other operating states, the first switching element 413 switches to select the first motion signal S _sport1 outputted by the control conversion circuit 411 to make the permanent magnet synchronous motor 2 follow the user. The set slope provides the ride mode desired by the user. When the user selects the function of turning off the power compensation, the first switching element 413 fixedly outputs the first motion signal S _sport1 as the motion command signal S _sport .

Please refer to FIG. 5, which is a detailed circuit block diagram of the control device of FIG. 2. The control conversion circuit 411 includes a gain conversion circuit 411a, wherein the gain conversion circuit 411a performs gain conversion according to the received control signal C to output a corresponding first motion signal S _sport1 . The power compensating device 412 includes a multiplier 412a, a gain adjuster 412b, and an arithmetic circuit 412c. When the user selects the function of turning on the power compensation, the multiplier 412a of the power compensating device 412 receives the rotational speed signal sent by the permanent magnet synchronous motor 2. ω, and the calculated rotational speed signal ω and the first motion signal S _{sport1 are} output to the gain adjuster 412b, and the arithmetic circuit 412c performs the operation of the signal adjusted by the gain adjuster 412b and the first motion signal S _sport1 to output The second motion signal S _{sport2 is} to the first switching element 413.

The coasting control device 42 includes a speed command generator 421, an arithmetic circuit 422, and a speed controller 423, wherein the speed command generator 421 is connected to the arithmetic circuit 422, and the arithmetic circuit 422 is further connected to the speed controller 423. In order to simulate a situation in which the bicycle can advance the bicycle by the inertia speed during the actual riding, the speed command generator 421 receives the rotational speed signal ω emitted by the permanent magnet synchronous motor 2, and generates a speed command signal ω ^* according to the rotational speed signal ω. The operation circuit 422 further calculates the speed command signal ω ^* and the rotation speed signal ω, and the speed controller 423 outputs the coasting command signal S _slide to the switching device 43 according to the operation result of the rotation speed signal ω and the speed command signal ω ^* , when the switching device 43 When the coasting command signal S _{slide is} output as the mode signal M, after the signal conversion output of the signal conversion device 5, the motor driving device 6 can be driven to drive the permanent magnet synchronous motor 2 to simulate the bicycle that the user rides has a bicycle-like actual ride. The multiplication time can be operated by the inertia speed to drive the bicycle forward.

Please refer to Fig. 5 and Fig. 6, at the same time, Fig. 6 is a schematic diagram of the operation of the switch device of Fig. 2. The switching device 43 includes a low pass filter 431, an arithmetic circuit 432, a hysteresis device 433, and a second switching element 434. The low pass filter 431 is connected to the arithmetic circuit 432, and the arithmetic circuit 432 is connected to the hysteresis device 433. The second switching element 434 The first end is connected to the output of the motion control device 41 or the output of the coasting control device 42, and the second end of the second switching element 434 is connected to the output of the switching device 43. The low-pass filter 431 converts the rotational speed signal ω into a comparison signal ω ^* , and the arithmetic circuit 432 calculates the difference signal Δω to the hysteresis device 433 according to the rotational speed signal ω and the received comparison signal ω ^* , and the hysteresis device 433 Controlling, by the received difference signal Δω, the second switching element 434 to switch between receiving the motion command signal S _sport or the coasting command signal S _slide , and when the difference signal Δω is greater than the first preset value Δω _H , indicating that the bicycle is The riding rate is increased, that is, the bicycle is operated in an accelerated manner, and the hysteresis device 433 controls the second switching element 434 to switch to receive the motion signal S _sport and output it as the mode signal M to satisfy the user's motion expectation. When the difference signal Δω is smaller than the second preset value Δω _L , it indicates that the riding rate of the bicycle is reduced, that is, the bicycle is operated in a deceleration manner, and the hysteresis device 433 controls the second switch 434 to switch to select the receiving taxi signal. S _slide and output it as a mode signal M to satisfy the user's expectation of rest, wherein the first preset value Δω _L is greater than the second preset value Δω _H , and the third end of the second switching element 434 The mode signal M is output according to the received motion command signal S _sport or the coasting command signal S _slide .

Referring to FIG. 1 again, in some embodiments, the control system 1 of the bicycle power generating device of the present invention further includes a bidirectional power conversion device 8 connected to the energy storage device 7 and the utility grid 10. When the permanent magnet synchronous motor 2 operates in the motor mode, the bidirectional power conversion device 8 can draw power from the utility grid 10 and store the electrical energy as the stored electrical energy V _dc of the energy storage device 7, and then store the stored electrical energy of the energy storage device 7 _{The dc is} transmitted to the permanent magnet synchronous motor 2, whereby the driving energy is supplied to drive the permanent magnet synchronous motor 2 to operate. When the permanent magnet synchronous motor 2 is operated in the generator mode, the electric energy generated by the permanent magnet synchronous motor 2 is stored in the energy storage device 7, and the bidirectional electric power conversion device 8 can feed back the electric energy V _dc stored in the energy storage device 7. To the city grid 10.

Please refer to FIG. 1 and FIG. 7 again. FIG. 7 is a schematic diagram of the operation of the two-way power conversion device and the energy-saving control device of the control system of the bicycle power generating device according to another preferred embodiment of the present invention. In some embodiments, the control system 1 of the bicycle power generating device of the present invention further includes an energy saving control device 9 connected to the energy storage device 7 and the bidirectional power conversion device 8. In order to save unnecessary power consumption, when the stored electric energy V _{dc of the} energy storage device 7 is greater than the third preset value V _dcH , the energy saving control device 9 activates the bidirectional power conversion device 8 to store the stored energy of the energy storage device 7 _{The dc is} fed back to the commercial power grid 10, and when the stored energy V _{dc of the} energy storage device 7 is less than the fourth preset value V _dcL , the energy saving control device 9 turns off the two-way power conversion device 8 to prevent the two-way power conversion device 8 from consuming non- Necessary power.

In summary, the present invention provides a control system for a bicycle power generating device, which transmits a permanent magnet synchronous motor in a sport mode or a taxi mode to provide a more versatile riding mode for the user. In addition, the control system of the bicycle power generating device of the present invention The pedal can be dynamically compensated when the pedal is perpendicular to the horizontal line to provide a more efficient pedaling mode for the user. The control system of the bicycle power generating device of the present invention can be preset by the energy storage control device to store energy in the energy storage device. When the value is changed, the two-way power conversion device is activated to achieve the purpose of energy saving.

The present invention has been described in detail by the above-described embodiments, and may be modified by those skilled in the art, without departing from the scope of the appended claims.

Bicycle power generation control system: 1
City Power Grid: 10
Carrier frame: 11
Scroll wheel: 12
Permanent magnet synchronous motor: 2
Encoder: 20
Bicycle: 21
Wheel set: 21a
Pedal: 21b
Operation interface: 3
Control device: 4
Signal conversion device: 5
Motor drive unit: 6
Energy storage device: 7
Two-way power conversion device: 8
Energy-saving control device: 9
Speed signal: ω
Control signal: C
Mode signal: M
Sports mode signal: Msport
Sliding mode signal: Mslide

Claims (8)

A control system for a bicycle power generating device, comprising: a permanent magnet synchronous motor, which is coupled with a wheel set of a bicycle and generates a rotational speed signal, and the permanent magnet synchronous motor operates in a generator mode or a motor mode; an operation interface a control signal is sent according to the user's control; a control device is connected to the permanent magnet synchronous motor and the operation interface, and generates a mode signal according to the rotation speed signal and the control signal, the control device further includes a motion control device, a gliding control device and a switch device, wherein the motion control device outputs a motion command signal according to the control signal, the gliding control device outputs a gliding command signal according to the speed signal, and the switch device selects according to the speed signal Optionally, the motion command signal and the coasting command signal are outputted as the mode signal, and the switching device further includes a low pass filter, an operation circuit, a hysteresis device and a second switching element, the low The pass filter converts the speed signal into a comparison signal, and the operation circuit is Calculating a difference signal according to the speed signal and the comparison signal, the hysteresis device controls the second switching element to switch to receive the motion signal or the taxi signal according to the difference signal, and one of the second switching elements outputs The mode signal is connected to the control device, and receives the mode signal and converts the mode signal into a motion mode signal or a coasting mode signal; and a motor driving device connected to the signal conversion device and The permanent magnet synchronous motor is configured to drive the permanent magnet synchronous motor to operate in a motion mode or a coasting mode according to the motion mode signal or the coasting mode signal; wherein when the permanent magnet synchronous motor is driven in the motion mode, the permanent magnet synchronous motor a synchronous motor is operated in the generator mode, the permanent magnet synchronous motor is driven by the power of the wheel of the bicycle to generate electric energy; and when the permanent magnet synchronous motor operates in the coasting mode, the permanent magnet synchronous motor operates In the motor mode, the permanent magnet synchronization operating in the motor mode is driven by electrical energy of a city grid Up. The control system of the bicycle power generating device according to claim 1, wherein the motion control device comprises a control conversion circuit, and the control conversion circuit is the control signal The number is converted into a first motion signal, so that the motion control device outputs the first motion signal as the motion command signal. The control system of the bicycle power generating device according to the second aspect of the invention, wherein the motion control device further comprises a power compensation device and a first switching component, the power compensation device is based on the rotational speed signal, the first motion signal And the second motion signal is outputted by the operation of the bicycle, and the first switching component is configured to switch to receive the first motion signal or the second motion signal and output the motion command signal. The control system of the bicycle power generating device according to claim 3, wherein when the pedal of the bicycle is perpendicular to a horizontal line, the second motion signal of the power compensating device is configured to drive the motor driving device The permanent magnet synchronous motor power compensates the wheel set of the bicycle. The control system of the bicycle power generating device according to claim 1, wherein when the difference signal is greater than a first preset value, the second switching element switches to selectively receive the motion signal; and when the difference signal When less than a second preset value, the second switching element switches to selectively receive the taxi signal. The control system of the bicycle power generating device according to claim 1, further comprising a bidirectional power conversion device connected to the motor driving device and the utility grid, wherein the permanent magnet synchronous motor operates in the motor mode The two-way power conversion device transmits the power provided by the utility grid to the motor drive device. The control system of the bicycle power generating device according to claim 6, wherein when the permanent magnet synchronous motor operates in the generator mode, the bidirectional power conversion device transmits the electric energy generated by the permanent magnet synchronous motor to The city's power grid. The control system for a bicycle power generating device according to claim 6, further comprising an energy saving control device, wherein the energy saving control device is connected to the two-way power conversion device to control power according to the permanent magnet synchronous motor The two-way power conversion device is turned on or off.