CN214315061U - Control circuit and synchronous belt transmission-based starting integrated motor - Google Patents
Control circuit and synchronous belt transmission-based starting integrated motor Download PDFInfo
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- CN214315061U CN214315061U CN202120314933.3U CN202120314933U CN214315061U CN 214315061 U CN214315061 U CN 214315061U CN 202120314933 U CN202120314933 U CN 202120314933U CN 214315061 U CN214315061 U CN 214315061U
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Abstract
The utility model belongs to fields such as engine, motor and generating set disclose a control circuit and because hold-in range transmission's initiation integration motor. The control circuit comprises a bidirectional DC-DC circuit, a PWM (pulse-width modulation) inverter rectifier circuit and a DSP (digital signal processor); the DSP is used for closed-loop control of the bidirectional DC-DC circuit and the PWM inverter rectifier circuit and switching the electric state and the power generation state of the motor; the bidirectional DC-DC circuit is used for driving the motor to be in an electric state and driving the engine to start in the electric state according to electric energy provided by an external power supply, and is also used for stabilizing the voltage of the external power supply in the power generation state; the PWM inverter rectifier circuit is used for maintaining the motor torque constant in an electric state and stabilizing voltage in a power generation state. The utility model discloses need not to carry out big improvement to the engine structure, starter and drive mechanism of engine just can cancel.
Description
Technical Field
The utility model belongs to fields such as engine, motor and generating set, concretely relates to control circuit reaches and arises out and send out integration motor based on synchronous belt drive.
Background
At present, two sets of conversion circuit systems are respectively adopted for the starting and generating functions of the known starting integrated motor, and the control system is large in size, complex in control and low in efficiency. Meanwhile, the starting and the power generation of the known engine are completed by two motors, namely a starter and a generator, wherein the starter is driven by a gear mechanism, and the generator is driven by a V-belt, so that the efficiency is low, the structure is complex, and the weight is heavy. With the development of society and the progress of science and technology, the requirements of improving efficiency, reducing volume, reducing weight and the like are put forward for the motor and the engine. With the development of power electronic devices, the control technology for starting and generating the engine through one motor is mature, but the existing integrated motor needs to be designed independently, so that the problems of high cost and complex structure exist.
Disclosure of Invention
An object of the utility model is to provide a control circuit and because synchronous belt drive's initiation integration motor for solve the problem that current integration motor among the prior art is with high costs and the structure is complicated.
In order to realize the task, the utility model discloses a following technical scheme:
a control circuit comprises a bidirectional DC-DC circuit, a PWM (pulse-width modulation) inverter rectifier circuit and a DSP (digital signal processor); the DSP is used for closed-loop control of the bidirectional DC-DC circuit and the PWM inverter rectifier circuit and switching the electric state and the power generation state of the motor; the bidirectional DC-DC circuit is used for driving the motor to be in an electric state and driving the engine to start in the electric state according to electric energy provided by an external power supply, and is also used for stabilizing the voltage of the external power supply in the power generation state; the PWM inverter rectifier circuit is used for maintaining the motor torque constant in an electric state and stabilizing voltage in a power generation state.
Further, the DSP switches the electric state and the power generation state of the motor according to the instruction of the upper computer.
Furthermore, the bidirectional DC-DC circuit comprises a first power tube, a second power tube, an energy storage inductor, a first filter capacitor and a second filter capacitor; the first power tube and the second power tube are connected in series and then connected in parallel with the second filter capacitor, one end of the energy storage inductor is connected with a common point of the first power tube and the second power tube, the other end of the energy storage inductor is connected with one end of the first filter capacitor, and the other end of the first filter capacitor is connected with the second power tube;
the PWM inverter rectifier circuit comprises a third power tube, a fourth power tube, a fifth power tube, a sixth power tube, a seventh power tube and an eighth power tube; the three power tubes and the four power tubes are connected in series and then connected in parallel with the second filter capacitor, the five power tubes and the six power tubes are connected in series, the seven power tubes and the eight power tubes are connected in series, the three power tubes connected in series are connected in parallel, the common point of the three power tubes and the four power tubes, the common point of the five power tubes and the six power tubes, and the common point of the seven power tubes and the eight power tubes are respectively connected with a three-phase line of the motor body;
the DSP is used for monitoring the voltage of the first filter capacitor, the current of the energy storage inductor and the voltage of the second filter capacitor.
The starting integrated motor based on synchronous belt transmission comprises a motor body and any control circuit;
the motor body comprises a motor shaft, the output end of the motor shaft is coaxially provided with a synchronous belt pulley, and the synchronous belt pulley is fixed with the motor shaft through a synchronous belt pulley pressing plate;
the control circuit is used for inputting three-phase alternating current electric energy to the motor body in an electric state, so that the motor shaft rotates and drives the engine to start through the synchronous belt pulley; and the synchronous pulley is also used for driving the motor shaft to rotate through the synchronous pulley after the engine is started in a power generation state, so that electric energy is output to the outside of the motor.
Compared with the prior art, the utility model has the following technical characteristics:
(1) the utility model provides a both can realize that the engine starts, can start the integration motor that goes on generating electricity after accomplishing again at the engine, combine the hold-in range, utilize the reversible principle of motor, can realize that starting and the electricity generation of engine are accomplished through a motor. The starter and the transmission mechanism of the engine can be eliminated without greatly improving the structure of the engine.
(2) The utility model discloses will change former V belt drive into synchronous belt drive, improve transmission efficiency.
Drawings
FIG. 1 is a diagram of a conversion circuit;
FIG. 2 is a control strategy for Boost mode of a bidirectional DC-DC converter;
FIG. 3 is a control strategy for Buck mode of a bidirectional DC-DC converter;
FIG. 4 is a schematic diagram of a timing belt;
FIG. 5 is a schematic cross-sectional view of a motor;
fig. 6 is a schematic view of the motor profile.
The reference numbers in the figures represent: the motor comprises a motor shell 1, a motor shaft 2, a front end cover 3, a front end cover 4, a rear end cover 5, a rear end cover 6, a rotor combination 7, a stator combination 8, a rotating stator combination 9, a rotating rotor combination 10, a synchronous pulley 11, a synchronous pulley pressing plate 12 and a rear end cover plate 13.
Detailed Description
The following embodiments of the present invention are given, and it should be noted that the present invention is not limited to the following embodiments, and all the equivalent transformations made on the basis of the technical solution of the present application all fall into the protection scope of the present invention.
In the present invention, unless otherwise specified, the use of directional terms such as "upper" and "lower" generally means that the terms are defined with reference to the drawing plane of the corresponding drawing, and "inner" and "outer" mean that the terms are inner and outer relative to the outline of the corresponding part.
The control circuit comprises a bidirectional DC-DC circuit, a PWM (pulse-width modulation) inverter rectifier circuit and a DSP (digital signal processor); the DSP is used for closed-loop control of the bidirectional DC-DC circuit and the PWM inverter rectifier circuit and switching the electric state and the power generation state of the motor; the bidirectional DC-DC circuit is used for driving the motor to be in an electric state and driving the engine to start in the electric state according to electric energy provided by an external power supply, and is also used for stabilizing the voltage of the external power supply in the power generation state; the PWM inverter rectifier circuit is used for maintaining the motor torque constant in an electric state and stabilizing voltage in a power generation state.
Specifically, the DSP switches the electric state and the power generation state of the motor according to the instruction of the upper computer. The DSP is also used for detecting the initial position of the motor rotor combination collected at the rotary transformer, and the state can be switched according to the set rotating speed threshold and the position threshold.
Specifically, the bidirectional DC-DC circuit includes a first power tube a1, a second power tube a2, an energy storage inductor L, a first filter capacitor C1, and a second filter capacitor C2; the first power tube a1 and the second power tube a2 are connected in series and then connected in parallel with a second filter capacitor C2, one end of the energy storage inductor L is connected with a common point of the first power tube a1 and the second power tube a2, the other end of the energy storage inductor L is connected with one end of a first filter capacitor C1, and the other end of the first filter capacitor C1 is connected to the second power tube a 2;
the PWM inverter rectifier circuit comprises a third power tube a3, a fourth power tube a4, a fifth power tube a5, a sixth power tube a6, a seventh power tube a7 and an eighth power tube a 8; the third power tube a3 and the fourth power tube a4 are connected in series and then connected in parallel with a second filter capacitor C2, the fifth power tube a5 and the sixth power tube a6 are connected in series, the seventh power tube a7 and the eighth power tube a8 are connected in series, the three power tubes connected in series are connected in parallel, the common point of the third power tube a3 and the fourth power tube a4, the common point of the fifth power tube a5 and the sixth power tube a6, and the common point of the seventh power tube a7 and the eighth power tube a8 are respectively connected with a three-phase line of the motor body;
the DSP is used for monitoring the voltage U1 at the first filter capacitor C1, the current iL at the energy storage inductor L and the voltage U2 at the second filter capacitor C2. The control circuit DSP is responsible for sampling voltage and current of each link in the main circuit and detecting the position, and realizes closed-loop control of the bidirectional DC-DC converter and the PWM rectifier.
The embodiment also discloses a Chinese starting integrated motor based on synchronous belt transmission, which comprises a motor body and any control circuit;
the motor body comprises a motor shaft 2, the output end of the motor shaft 2 is coaxially provided with a synchronous belt pulley 11, and the synchronous belt pulley 11 is fixed with the motor shaft 2 through a synchronous belt pulley pressing plate 12;
the control circuit is used for inputting three-phase alternating current electric energy to the motor body in an electric state, so that the motor shaft 2 rotates and drives the engine to start through the synchronous belt pulley 11; and the synchronous belt pulley is also used for driving the motor shaft 2 to rotate by the started engine through the synchronous belt pulley 11 in a power generation state so as to output electric energy to the outside of the motor.
(1) When starting: the motor is in an electric state as shown in fig. 2. The bidirectional DC-DC converter works in a Boost mode, and the control target is that U2 is stable; the PWM rectifier works in an inversion state, the U2 is inverted into an alternating current drive motor, the control target is that the motor torque is constant, and the motor constant-torque acceleration is realized.
(2) During power generation: the motor is in a power generation state as shown in figure 3. The bidirectional DC-DC converter works in a Buck mode, and the control target is that U1 is stable; the PWM rectifier works in an inversion state, the control target is that U2 is stable, and meanwhile the motor efficiency is highest.
The working process of the utility model is as follows:
the motor is connected to an external power supply and a control circuit, the initial position of a rotor combination is detected through a rotary transformer, and then according to the initial position, an external controller inputs corresponding three-phase alternating current electric energy to a stator combination of the motor to enable a motor shaft to rotate and drive an engine to start. After the engine is started successfully, the controller immediately stops inputting three-phase alternating current electric energy to the motor, at the moment, the engine drives the motor shaft to rotate, the rotor combination generates a rotating magnetic field, the stator combination cuts magnetic lines of force, and then electric energy is generated and output outwards.
As shown in fig. 5, the embodiment further discloses a specific structure of an initiation integrated motor based on synchronous belt transmission, which includes: 1, a motor shell, 2 motor shafts, 3 front end covers, 4 front end cover bearings, 5 rear end covers, 6 rear end cover bearings, 7 rotor combinations, 8 stator combinations, 9 rotating stator combinations, 10 rotating rotor combinations, 11 synchronous pulleys, 12 synchronous pulley pressing plates and 13 rear end cover plates;
the motor is mounted in the following way:
(1) firstly, a rotor combination 7 is pressed and installed on a corresponding position of a motor shaft 2 through a key and interference fit, and then front and rear bearings 4 and 6 are pressed and installed on corresponding positions of the motor shaft 2 through interference fit to form a moving assembly;
(2) the stator combination 8 is pressed on a corresponding position in the motor shell 1 through interference fit, and then the rear end cover 5 of the motor is fixed on the rear end face of the motor shell 1 through a bolt to form a fixing assembly;
(3) the moving assembly penetrates through the fixing assembly, the rear end cover 5 is fixed on the corresponding position of the rear end cover through transition fit, then the front end cover 3 is fixed on the front end face of the motor shell 1 through bolts, and meanwhile, the front end cover bearing 4 is fixed on the front end cover 3 through transition fit.
(4) Fixing a rotary transformer rotor combination 10 on a corresponding position of a shaft 2 through a key and interference fit, fixing a rotary transformer stator combination 9 on a rear end cover 6 through an interference fit and a bolt, and fixing a rear end cover plate 13 through a bolt after combustion;
(5) finally, the synchronous pulley 11 is fixed at a corresponding position at the front end of the shaft 2 through a key and a bolt, and the whole motor is formed.
The utility model discloses utilize the reversible basic operating principle of motor, adopt the PMSM based on vector control, output shaft end design synchronous pulley. The structure of the motor mainly comprises a motor shell, a shaft, a front end cover, a rear end cover, a stator combination, a rotor combination, a rotary transformer, a synchronous belt pulley and other parts. The rotary transformer mainly comprises a rotary transformer stator and a rotary transformer rotor and is used for detecting the initial position of a rotor combination; the rotor combination mainly comprises a rotor iron core and a permanent magnet and is used for forming a rotor magnetic field of the motor; the stator combination mainly comprises a stator core and a stator coil, and generates a rotary variable magnetic field of the stator when starting, and generates electric energy to be output when generating electricity; the motor shell is used for fixing a motor stator combination, and heat dissipation teeth are designed outside the shell to dissipate heat of the motor; the front end cover and the rear end cover are respectively fixed at two ends of the motor shell and the shaft and used for supporting the motor shell and the shaft, and fixing holes are designed for fixing the whole motor device.
Claims (4)
1. A control circuit is characterized by comprising a bidirectional DC-DC circuit, a PWM (pulse-width modulation) inverter rectifier circuit and a DSP (digital signal processor); the DSP is used for closed-loop control of the bidirectional DC-DC circuit and the PWM inverter rectifier circuit and switching the electric state and the power generation state of the motor; the bidirectional DC-DC circuit is used for driving the motor to be in an electric state and driving the engine to start in the electric state according to electric energy provided by an external power supply, and is also used for stabilizing the voltage of the external power supply in the power generation state; the PWM inverter rectifier circuit is used for maintaining the motor torque constant in an electric state and stabilizing voltage in a power generation state.
2. The control circuit of claim 1, wherein the DSP switches the motoring state and the generating state of the motor according to the host computer instructions.
3. The control circuit of claim 1, wherein the bidirectional DC-DC circuit comprises a first power transistor (a1), a second power transistor (a2), an energy storage inductor (L), a first filter capacitor (C1), and a second filter capacitor (C2); the first power tube (a1) and the second power tube (a2) are connected in series and then connected in parallel with a second filter capacitor (C2), one end of the energy storage inductor (L) is connected with a common point of the first power tube (a1) and the second power tube (a2), the other end of the energy storage inductor (L) is connected with one end of a first filter capacitor (C1), and the other end of the first filter capacitor (C1) is connected to the second power tube (a 2);
the PWM inverter rectifier circuit comprises a third power tube (a3), a fourth power tube (a4), a fifth power tube (a5), a sixth power tube (a6), a seventh power tube (a7) and an eighth power tube (a 8); the three-phase motor is characterized in that a third power tube (a3) and a fourth power tube (a4) are connected in series and then connected with a second filter capacitor (C2) in parallel, a fifth power tube (a5) and a sixth power tube (a6) are connected in series, a seventh power tube (a7) and an eighth power tube (a8) are connected in series, three paths of power tubes connected in series are connected in parallel, a common point of the third power tube (a3) and the fourth power tube (a4), a common point of the fifth power tube (a5) and the sixth power tube (a6), and a common point of the seventh power tube (a7) and the eighth power tube (a8) are respectively connected with a three-phase line of a motor body;
the DSP is used for monitoring the voltage U1 at the first filter capacitor (C1), the current iL at the energy storage inductor (L) and the voltage U2 at the second filter capacitor (C2).
4. The starting integrated motor based on synchronous belt transmission is characterized by comprising a motor body and a control circuit as claimed in any one of claims 1 to 3;
the motor body comprises a motor shaft (2), a synchronous belt wheel (11) is coaxially arranged at the output end of the motor shaft (2), and the synchronous belt wheel (11) is fixed with the motor shaft (2) through a synchronous belt wheel pressing plate (12);
the control circuit is used for inputting three-phase alternating current electric energy to the motor body in an electric state, so that the motor shaft (2) rotates and drives the engine to start through the synchronous belt wheel (11); and the synchronous belt wheel is also used for driving the motor shaft (2) to rotate by the started engine through the synchronous belt wheel (11) in a power generation state so as to output electric energy to the outside of the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120314933.3U CN214315061U (en) | 2021-02-03 | 2021-02-03 | Control circuit and synchronous belt transmission-based starting integrated motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120314933.3U CN214315061U (en) | 2021-02-03 | 2021-02-03 | Control circuit and synchronous belt transmission-based starting integrated motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214315061U true CN214315061U (en) | 2021-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120314933.3U Active CN214315061U (en) | 2021-02-03 | 2021-02-03 | Control circuit and synchronous belt transmission-based starting integrated motor |
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| Country | Link |
|---|---|
| CN (1) | CN214315061U (en) |
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2021
- 2021-02-03 CN CN202120314933.3U patent/CN214315061U/en active Active
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