CN214756134U - Chopper voltage adjustable switch reluctance motor driver - Google Patents
Chopper voltage adjustable switch reluctance motor driver Download PDFInfo
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- CN214756134U CN214756134U CN202121472542.0U CN202121472542U CN214756134U CN 214756134 U CN214756134 U CN 214756134U CN 202121472542 U CN202121472542 U CN 202121472542U CN 214756134 U CN214756134 U CN 214756134U
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Abstract
The utility model discloses a chopper voltage adjustable switch reluctance motor driver, which comprises a control circuit B and a current chopper circuit F, wherein the control circuit B comprises an MCU; the current chopper circuit F comprises a motor current sampling amplifying circuit F1, an adjustable voltage chopper circuit F2 and a voltage comparison chopper output circuit F3; the output end of the motor current sampling amplifying circuit F1 is connected with the inverted input end of the voltage comparison chopper output circuit F3, and the motor current sampling amplifying circuit F1 is used for sampling and amplifying the motor current to obtain a sampling voltage I _ sense; and the input end of the adjustable voltage chopper circuit F2 is connected with an I/O pin of the MCU. The utility model provides a chopper voltage adjustable switched reluctance motor driver can realize the adjustable of chopper threshold voltage, in switched reluctance motor's driver circuit, can realize the analog DAC function on the MCU of no DAC function.
Description
Technical Field
The utility model relates to a chopping voltage adjustable switched reluctance motor driver belongs to switched reluctance motor control field.
Background
At present, as a motor control and speed regulation system gradually developed and perfected in recent years, a switched reluctance motor control and speed regulation system is rapidly developed under a control theory which is gradually perfected. In the control system, a Combination of Current Chopping (CCC) and Angular Position Control (APC) becomes the main flow control method. In specific implementation, there are software implementation control methods and hardware implementation control methods, and there are many kinds of required components. In response speed, software is generally lower than hardware, so that the control mode adopting hardware chopping is more.
Most hardware current chopping adopts a single-valve chopper circuit (namely, resistor voltage division) to perform starting and current-limiting chopping under high current. The control circuit is simple, but large torque ripple and electromagnetic noise are generated in the starting process, and the impact on power devices is large. And the other is to use an adjustable chopper circuit to carry out starting and current-limiting chopping under large current. The mode can greatly reduce the torque ripple and the electromagnetic noise during starting and reduce the impact on a power circuit. However, the chopping threshold value can be adjusted by using the DAC function (i.e., digital-to-analog conversion) of the MCU, and the MCU with the DAC function is expensive, which is not favorable for cost control of the project.
Disclosure of Invention
The utility model aims to solve the technical problem that, overcome prior art not enough, provide a chopping voltage adjustable switched reluctance motor driver, can realize the adjustable of chopping threshold value voltage, in switched reluctance motor's driver circuit, can realize the analog DAC function on the MCU of no DAC function.
In order to solve the technical problem, the technical scheme of the utility model is that:
a chopped voltage tunable switched reluctance motor driver comprising:
the control circuit B comprises an MCU;
the current chopper circuit F comprises a motor current sampling amplifying circuit F1, an adjustable voltage chopper circuit F2 and a voltage comparison chopper output circuit F3;
the output end of the motor current sampling amplifying circuit F1 is connected with the inverted input end of the voltage comparison chopper output circuit F3, and the motor current sampling amplifying circuit F1 is used for sampling and amplifying the motor current to obtain a sampling voltage I _ sense;
the input end of the adjustable voltage chopper circuit F2 is connected with an I/O pin of an MCU (microprogrammed control Unit), the output end of the adjustable voltage chopper circuit F2 is connected with the non-inverting input end of a voltage comparison chopper output circuit F3, and the MCU outputs a chopper voltage Vref with an adjustable threshold value through the adjustable voltage chopper circuit F2;
the output end of the voltage comparison chopping output circuit F3 is connected with a FAULT pin of the MCU, and the voltage comparison chopping output circuit F3 is used for comparing the sampling voltage I _ sense with the chopping voltage Vref and controlling the voltage of the FAULT pin of the MCU.
Further, the adjustable voltage chopper circuit F2 includes a voltage division filter circuit, a third operational amplifier circuit and a chopper voltage output circuit, the input terminal of the voltage division filter circuit is connected to the I/O pin of the MCU, the output terminal of the voltage division filter circuit is connected to the input terminal of the third operational amplifier circuit, the output terminal of the third operational amplifier circuit is connected to the a/D sampling pin of the MCU and the input terminal of the chopper voltage output circuit, and the output terminal of the chopper voltage output circuit is connected to the non-inverting input terminal of the voltage comparison chopper output circuit F3.
Further, the third operational amplifier circuit comprises a third operational amplifier U3, a resistor R13, a resistor R10 and an electrolytic capacitor C4, one end of the resistor R13 is connected to the inverting input end of the third operational amplifier U3, the other end of the resistor R13 is connected to the output end of the third operational amplifier U3, the anode of the electrolytic capacitor C4 is connected to the output end of the third operational amplifier U3, the cathode of the electrolytic capacitor C4 is connected to GND, one end of the resistor R10 is connected to the output end of the third operational amplifier U3, and the other end of the resistor R10 is connected to the a/D sampling pin of the MCU.
Further, the voltage division filter circuit comprises a resistor R9, a resistor R11 and a capacitor C3, one end of the resistor R9 is connected with an I/O pin of the MCU, the other end of the resistor R9 is connected with a non-inverting input end of a third operational amplifier U3, one end of the resistor R11 is connected with a non-inverting input end of the third operational amplifier U3, the other end of the resistor R11 is connected with GND, one end of the capacitor C3 is connected with a non-inverting input end of the third operational amplifier U3, and the other end of the capacitor C3 is connected with GND.
Further, the chopping voltage output circuit comprises a resistor R12 and a resistor R14, one end of the resistor R12 is connected with the output end of the third operational amplifier U3, the other end of the resistor R12 is connected with one end of the resistor R14, the other end of the resistor R14 is connected with GND, and the connection end of the resistor R12 and the resistor R14 is connected with the non-inverting input end of the voltage comparison chopping output circuit F3.
Further, the voltage comparison chopper output circuit F3 includes a comparator U2, a resistor R3, a resistor R7, and a resistor R5, an output terminal of the comparator U2 is connected to a FAULT pin of the MCU, a non-inverting input terminal of the comparator U2 is connected to a connection terminal of the resistor R12 and the resistor R14, one end of the resistor R3 is connected to the power VCC, the other end of the resistor R3 is connected to an output terminal of the comparator U2, one end of the resistor R7 is connected to an output terminal of the comparator U2, the other end of the resistor R7 is connected to a connection terminal of the resistor R12 and the resistor R14, a connection terminal of the resistor R7, the resistor R12, and the resistor R14 is connected to a non-inverting input terminal of the comparator U2, one end of the resistor R5 is connected to an inverting input terminal of the comparator U2, and the other end of the resistor R5 is connected to an output terminal of the motor current sampling amplifier circuit F1.
Further, the output end of the third operational amplifier U3 outputs the feedback voltage Vout, and the connection end of the resistor R7, the resistor R12 and the resistor R14 outputs the chopping voltage Vref.
Further, the motor current sampling amplifying circuit F1 includes a first operational amplifier U1, a resistor R1, a resistor R2, a resistor R6, a resistor R8, a capacitor C1 and a capacitor C2, an output end of the first operational amplifier U1 is connected to the other end of the resistor R5, one end of the resistor R1 is connected to an output end of the first operational amplifier U1, the other end of the resistor R1 is connected to an inverting input end of the first operational amplifier U1, the capacitor C1 is connected in parallel to both ends of the resistor R1, one end of the resistor R2 is connected to the inverting input end of the first operational amplifier U1, the other end of the resistor R2 is connected to PGND, one end of the resistor R6 is connected to a non-inverting input end of the first operational amplifier U1, the other end of the resistor R6 is connected to one end of the capacitor C2, the other end of the capacitor C2 is connected to the PGND 2, both ends of the capacitor C2 are connected in parallel to the current sampling resistor R21, one end of the resistor R8 is connected with the non-inverting input end of the first operational amplifier U1, and the other end of the resistor R8 is connected with a power supply VCC.
Further, the switched reluctance motor driver with the adjustable chopping voltage further comprises a driving and inverting circuit D, and the driving and inverting circuit D is used for driving and controlling the switched reluctance motor E;
and the current chopper circuit F adjusts the output chopping voltage Vref according to the output of an I/O pin of the MCU in the control circuit B, and then controls the on-off of the driving and inverting circuit D.
Further, the switched reluctance motor driver with the adjustable chopping voltage further comprises a power supply circuit A, wherein the power supply circuit A is used for converting 220V alternating current into 310V direct current power supply for the switched reluctance motor driver.
By adopting the technical scheme, the utility model discloses following beneficial effect has:
when the motor is started, the utility model can adjust the size of the feedback voltage Vout by inputting the adjustable voltage chopper circuit F2, so that the chopper voltage Vref is in a lower threshold value; and then the voltage comparison chopper output circuit F3 controls the on-off of the power tube in the driving and inverting circuit D, so that the starting current in the circuit is smaller, the starting is smoother, and the electromagnetic noise and the electric stress impact on a power device are reduced.
When the motor on-load operation, the utility model discloses adjustable feedback voltage Vout makes chopper voltage Vref be in higher threshold value for comparator U1's threshold value increase makes switched reluctance motor winding current grow, exports great current power.
The adjustable voltage chopper circuit F2 simulates the DAC function of the MCU, so that the voltage can be adjusted in a wider range, the electromagnetic noise is reduced during starting, the motor vibration is reduced, and the electric stress impact on a power device is reduced. And the motor can realize constant power output and constant rotating speed output in a wider range.
Drawings
Fig. 1 is a schematic circuit block diagram of a switched reluctance motor driver with adjustable chopping voltage according to the present invention;
fig. 2 is a schematic circuit diagram of the current chopper circuit of the present invention.
Detailed Description
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.
As shown in fig. 1, the present embodiment provides a switched reluctance motor driver with adjustable chopping voltage, which includes a power circuit a, a control circuit B, a driving and inverting circuit D, and a current chopping circuit F. The power supply circuit A is used for rectifying 220VAC/50HZ alternating current to obtain a 310V direct-current power supply used by the switched reluctance motor driver, and the driving and inverting circuit D is used for driving and controlling the switched reluctance motor E.
The current chopper circuit F adjusts the output chopping voltage Vref according to the output of an I/O pin of the MCU in the control circuit B, then controls the on-off of a power tube in the driving and inverting circuit D, and controls the current in the motor circuit.
As shown in fig. 2, this embodiment provides a current chopper circuit F, which includes an MCU, a motor current sampling amplifier circuit F1, an adjustable voltage chopper circuit F2, and a voltage comparison chopper output circuit F3, where an output terminal of the motor current sampling amplifier circuit F1 is connected to an inverting input terminal of the voltage comparison chopper output circuit F3, an input terminal of the adjustable voltage chopper circuit F2 is connected to an I/O pin of the MCU, an output terminal of the adjustable voltage chopper circuit F2 is connected to a non-inverting input terminal of the voltage comparison chopper output circuit F3, an output terminal of the voltage comparison chopper output circuit F3 is connected to a FAULT pin of the MCU, and the voltage comparison chopper output circuit F3 is used to compare a sampling voltage I _ sense with a chopper voltage Vref.
As shown in fig. 2, the motor current sampling and amplifying circuit F1 is configured to sample and amplify the motor current to obtain a sampled voltage I _ sense. The motor current sampling amplifying circuit F1 comprises a first operational amplifier U1, a resistor R1, a resistor R2, a resistor R6, a resistor R8, a capacitor C1 and a capacitor C2, wherein an output end of the first operational amplifier U1 is connected with the other end of the resistor R5, one end of the resistor R1 is connected with an output end of the first operational amplifier U1, the other end of the resistor R1 is connected with an inverting input end of the first operational amplifier U1, the capacitor C1 is connected in parallel with two ends of the resistor R1, one end of the resistor R1 is connected with the inverting input end of the first operational amplifier U1, the other end of the resistor R1 is connected with a non-inverting input end of the first operational amplifier U1, the other end of the resistor R1 is connected with a PGND, two ends of the capacitor C1 are connected with a current sampling resistor R1 in parallel, one end of the resistor R1 is connected with a non-inverting input end of the first operational amplifier U1, the other end of the resistor R8 is connected to a power supply VCC.
As shown in fig. 2, the MCU outputs a threshold-adjustable chopping voltage Vref through an adjustable voltage chopper circuit F2, the adjustable voltage chopper circuit F2 includes a voltage-dividing filter circuit, a third operational amplifier circuit and a chopping voltage output circuit, an input terminal of the voltage-dividing filter circuit is connected to an I/O pin of the MCU, an output terminal of the voltage-dividing filter circuit is connected to an input terminal of the third operational amplifier circuit, an output terminal of the third operational amplifier circuit is connected to an a/D sampling pin of the MCU and an input terminal of the chopping voltage output circuit, and an output terminal of the chopping voltage output circuit is connected to a non-inverting input terminal of the voltage-comparing chopper output circuit F3.
The third operational amplifier circuit comprises a third operational amplifier U3, a resistor R13, a resistor R10 and an electrolytic capacitor C4, wherein one end of the resistor R13 is connected with the inverting input end of the third operational amplifier U3, the other end of the resistor R13 is connected with the output end of the third operational amplifier U3, the anode of the electrolytic capacitor C4 is connected with the output end of the third operational amplifier U3, the cathode of the electrolytic capacitor C4 is connected with GND, one end of the resistor R10 is connected with the output end of the third operational amplifier U3, and the other end of the resistor R10 is connected with an A/D sampling pin of the MCU.
The voltage division filter circuit comprises a resistor R9, a resistor R11 and a capacitor C3, one end of the resistor R9 is connected with an I/O pin of the MCU, the other end of the resistor R9 is connected with a non-inverting input end of a third operational amplifier U3, one end of a resistor R11 is connected with a non-inverting input end of the third operational amplifier U3, the other end of the resistor R11 is connected with GND, one end of a capacitor C3 is connected with a non-inverting input end of the third operational amplifier U3, and the other end of the capacitor C3 is connected with GND.
The chopping voltage output circuit comprises a resistor R12 and a resistor R14, one end of the resistor R12 is connected with the output end of the third operational amplifier U3, the other end of the resistor R12 is connected with one end of the resistor R14, the other end of the resistor R14 is connected with GND, and the connecting end of the resistor R12 and the resistor R14 is connected with the non-inverting input end of the voltage comparison chopping output circuit F3.
As shown in fig. 2, the voltage comparison chopper output circuit F3 is used for comparing the sampled voltage I _ sense and the chopper voltage Vref, and controlling the voltage of the FAULT pin of the MCU. The voltage comparison chopper output circuit F3 comprises a comparator U2, a resistor R3, a resistor R7 and a resistor R5, wherein the output end of the comparator U2 is connected with a FAULT pin of the MCU, the non-inverting input end of the comparator U2 is connected with the connecting end of the resistor R12 and the resistor R14, one end of the resistor R3 is connected with a power supply VCC, the other end of the resistor R3 is connected with the output end of the comparator U2, one end of the resistor R7 is connected with the output end of the comparator U2, the other end of the resistor R7 is connected with the non-inverting input end of the comparator U2, one end of the resistor R5 is connected with the inverting input end of the comparator U2, and the other end of the resistor R5 is connected with the output end of the motor current sampling amplifying circuit F1.
The working principle of the current chopper circuit F in this embodiment is as follows:
the working principle of the adjustable voltage chopper circuit F2 is as follows: after the MCU is powered on and initialized, the I/O pin of the MCU is configured to output a PWM wave, which is transmitted at a fixed frequency (adjustable duty cycle). The resistors R9 and R11 and the capacitor C3 form a voltage division filter circuit, and the duty ratio of PWM waves can be adjusted through a program algorithm, so that the average value of the output voltage of the I/O pin is controlled. A comparatively stable filter voltage V + can be obtained at the capacitor C3 by means of the voltage-dividing filter circuit. The filtered voltage V + is subjected to voltage following by the operational amplifier U3 and the resistor R13, and is filtered by the electrolytic capacitor C4 to obtain a stable feedback voltage Vout (due to voltage following, the feedback voltage Vout is equal to the filtered voltage V + at the non-inverting input terminal of the operational amplifier U3). The voltage of the feedback voltage Vout is connected to the A/D sampling pin of the MCU through a resistor R10. At this time, the MCU can detect the exact value of the feedback voltage Vout. Therefore, the magnitude of the feedback voltage Vout is adjusted by adjusting the PWM duty ratio. The feedback voltage Vout is detected to float within 3% up and down, and the requirement of stability is met.
The feedback voltages Vout and VCC are divided by resistors R12, R14, R7 and R3 according to Thevenin's theorem to obtain a chopping voltage Vref. A voltage signal I _ sense obtained by a motor current sampling amplifying circuit F1 after sampling and amplifying through an operational amplifier U1 is compared with chopping voltage Vref output by an adjustable voltage chopping circuit F2 through a comparator U2, when the I _ sense is larger than the Vref, the output end of the comparator U2 is low, and after a FAULT pin is pulled down, a drive output pin in an MCU (namely input pins of IC1 and IC2 in a drive and inversion circuit D) is triggered to output a low level, so that an inversion power tube in the circuit D is closed, namely current in the circuit is turned off. When the I _ sense is less than Vref, the output terminal of the comparator U2 is high, the FAULT pin is pulled high, the driving output pin in the MCU is triggered to output a normal signal, and the normal operation of the inverter power tube in the inverter circuit D is controlled.
The MCU of model STM32F030K6T6 is adopted in this embodiment, specifically demonstrates whole pressure regulating process:
the MCU adopts a 3.3V power supply, and the PWM output frequency of an I/O pin is 10 KHZ. When the PWM duty ratio is 100%, the voltage of the obtained feedback voltage Vout is 3V, and when I _ sense < Vref, the output terminal of the comparator U2 is high, and according to thevenin theorem, Vref is 2.08V; when I _ sense > Vref, the output end of the comparator U2 is low, and Vref is 1.87V according to Thevenin theorem; the voltage return difference is 0.2V. When the PWM duty ratio is adjusted to 66%, the voltage of the feedback voltage Vout is 2V, and when I _ sense < Vref, Vref is 1.45V; when I _ sense > Vref, Vref ═ 1.25V; the voltage return difference is 0.2V. In summary, different voltage values of the feedback voltage Vout can be obtained by adjusting the duty ratio, so that different chopping voltage Vref values of the motor are changed to adjust different current power ranges.
The above-mentioned embodiments further explain in detail the technical problems, technical solutions and advantages solved by the present invention, and it should be understood that the above only is a specific embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A chopper voltage adjustable switched reluctance motor driver comprising:
the control circuit B comprises an MCU;
the current chopper circuit F comprises a motor current sampling amplifying circuit F1, an adjustable voltage chopper circuit F2 and a voltage comparison chopper output circuit F3;
the output end of the motor current sampling amplifying circuit F1 is connected with the inverted input end of the voltage comparison chopper output circuit F3, and the motor current sampling amplifying circuit F1 is used for sampling and amplifying the motor current to obtain a sampling voltage I _ sense;
the input end of the adjustable voltage chopper circuit F2 is connected with an I/O pin of an MCU (microprogrammed control Unit), the output end of the adjustable voltage chopper circuit F2 is connected with the non-inverting input end of a voltage comparison chopper output circuit F3, and the MCU outputs a chopper voltage Vref with an adjustable threshold value through the adjustable voltage chopper circuit F2;
the output end of the voltage comparison chopping output circuit F3 is connected with a FAULT pin of the MCU, and the voltage comparison chopping output circuit F3 is used for comparing the sampling voltage I _ sense with the chopping voltage Vref and controlling the voltage of the FAULT pin of the MCU.
2. The chopped voltage tunable switched reluctance motor driver according to claim 1, wherein: the adjustable voltage chopper circuit F2 comprises a voltage division filter circuit, a third operational amplifier circuit and a chopper voltage output circuit, wherein the input end of the voltage division filter circuit is connected with an I/O pin of an MCU (microprogrammed control unit), the output end of the voltage division filter circuit is connected with the input end of the third operational amplifier circuit, the output end of the third operational amplifier circuit is respectively connected with an A/D (analog/digital) sampling pin of the MCU and the input end of the chopper voltage output circuit, and the output end of the chopper voltage output circuit is connected with the in-phase input end of a voltage comparison chopper output circuit F3.
3. The chopped voltage tunable switched reluctance motor driver according to claim 2, wherein: the third operational amplifier circuit comprises a third operational amplifier U3, a resistor R13, a resistor R10 and an electrolytic capacitor C4, one end of the resistor R13 is connected with the inverting input end of the third operational amplifier U3, the other end of the resistor R13 is connected with the output end of the third operational amplifier U3, the positive electrode of the electrolytic capacitor C4 is connected with the output end of the third operational amplifier U3, the negative electrode of the electrolytic capacitor C4 is connected with GND, one end of the resistor R10 is connected with the output end of the third operational amplifier U3, and the other end of the resistor R10 is connected with an A/D sampling pin of the MCU.
4. The chopped voltage tunable switched reluctance motor driver according to claim 3, wherein: the voltage division filter circuit comprises a resistor R9, a resistor R11 and a capacitor C3, one end of the resistor R9 is connected with an I/O pin of the MCU, the other end of the resistor R9 is connected with a non-inverting input end of a third operational amplifier U3, one end of the resistor R11 is connected with a non-inverting input end of the third operational amplifier U3, the other end of the resistor R11 is connected with GND, one end of the capacitor C3 is connected with a non-inverting input end of the third operational amplifier U3, and the other end of the capacitor C3 is connected with GND.
5. The chopped voltage tunable switched reluctance motor driver according to claim 3, wherein: the chopping voltage output circuit comprises a resistor R12 and a resistor R14, one end of the resistor R12 is connected with the output end of a third operational amplifier U3, the other end of the resistor R12 is connected with one end of a resistor R14, the other end of the resistor R14 is connected with GND, and the connection end of the resistor R12 and the resistor R14 is connected with the non-inverting input end of a voltage comparison chopping output circuit F3.
6. The chopped voltage tunable switched reluctance motor driver according to claim 5, wherein: the voltage comparison chopper output circuit F3 comprises a comparator U2, a resistor R3, a resistor R7 and a resistor R5, wherein the output end of the comparator U2 is connected with a FAULT pin of the MCU, the non-inverting input end of the comparator U2 is connected with the connecting end of the resistor R12 and the resistor R14, one end of the resistor R3 is connected with a power supply VCC, the other end of the resistor R3 is connected with the output end of the comparator U2, one end of the resistor R7 is connected with the output end of the comparator U2, the other end of the resistor R7 is connected with the connecting end of the resistor R12 and the resistor R14, the connecting end of the resistor R7, the resistor R12 and the resistor R14 is connected with the non-inverting input end of the comparator U2, one end of the resistor R5 is connected with the inverting input end of the comparator U2, and the other end of the resistor R5 is connected with the output end of the motor current sampling amplifier circuit F1.
7. The chopped voltage tunable switched reluctance motor driver according to claim 6, wherein: the output end of the third operational amplifier U3 outputs a feedback voltage Vout, and the connection end of the resistor R7, the resistor R12 and the resistor R14 outputs a chopping voltage Vref.
8. The chopped voltage tunable switched reluctance motor driver according to claim 6, wherein: the motor current sampling amplifying circuit F1 includes a first operational amplifier U1, a resistor R1, a resistor R2, a resistor R6, a resistor R8, a capacitor C1 and a capacitor C2, an output terminal of the first operational amplifier U1 is connected to the other terminal of the resistor R5, one terminal of the resistor R1 is connected to an output terminal of the first operational amplifier U1, the other terminal of the resistor R1 is connected to an inverting input terminal of the first operational amplifier U1, the capacitor C1 is connected in parallel to both terminals of the resistor R1, one terminal of the resistor R1 is connected to the inverting input terminal of the first operational amplifier U1, the other terminal of the resistor R1 is connected to a PGND, one terminal of the resistor R1 is connected to a non-inverting input terminal of the first operational amplifier U1, the other terminal of the capacitor C1 is connected to a PGND, both terminals of the capacitor C1 are connected in parallel to a non-inverting input terminal of the first operational amplifier U1, one terminal of the resistor R1 is connected to a non-inverting input terminal of the first operational amplifier U1, the other end of the resistor R8 is connected with a power supply VCC.
9. The chopped voltage tunable switched reluctance motor driver according to claim 1, wherein: the driving and inverting circuit D is used for driving and controlling the switched reluctance motor E;
and the current chopper circuit F adjusts the output chopping voltage Vref according to the output of an I/O pin of the MCU in the control circuit B, and then controls the on-off of the driving and inverting circuit D.
10. The chopped voltage tunable switched reluctance motor driver according to claim 1, wherein: also included is a power supply circuit a for converting 220V ac power to 310V dc power for use with a switched reluctance motor drive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121472542.0U CN214756134U (en) | 2021-06-30 | 2021-06-30 | Chopper voltage adjustable switch reluctance motor driver |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121472542.0U CN214756134U (en) | 2021-06-30 | 2021-06-30 | Chopper voltage adjustable switch reluctance motor driver |
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| CN214756134U true CN214756134U (en) | 2021-11-16 |
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