CN110971157A - Drive waveform design system of direct current brushless motor - Google Patents
Drive waveform design system of direct current brushless motor Download PDFInfo
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- CN110971157A CN110971157A CN201911290035.2A CN201911290035A CN110971157A CN 110971157 A CN110971157 A CN 110971157A CN 201911290035 A CN201911290035 A CN 201911290035A CN 110971157 A CN110971157 A CN 110971157A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/28—Arrangements for controlling current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2205/00—Indexing scheme relating to controlling arrangements characterised by the control loops
- H02P2205/01—Current loop, i.e. comparison of the motor current with a current reference
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Abstract
The invention discloses a system for designing a driving waveform of a brushless direct current motor, belongs to the field of driving control of the brushless direct current motor, and relates to the design of the driving waveform of the brushless direct current motor. The system takes a microcontroller as a core and consists of a power supply management module, an isolation module, a digital-to-analog conversion control module, an operational amplification module, a three-phase six-bridge driving module and a current detection module. The digital output end of the power management module is connected with the microcontroller and the isolation module, and the analog output end of the power management module is connected with the isolation module, the digital-to-analog conversion control module, the operational amplification module, the three-phase six-bridge drive module and the current detection module respectively. The output end of the microcontroller is connected with the input end of the isolation module, the input end of the microcontroller is connected with the output end of the isolation module, and the output end of the isolation module is connected with the input end of the digital-to-analog conversion control module. The system has good robustness, not only meets the requirements of safety and stability of the existing new energy electric automobile, but also can be used in various industrial occasions, and improves the economic benefit.
Description
Technical Field
The invention belongs to the field of brushless direct current motor drive control, relates to design and optimization of drive waveforms of a brushless direct current motor, and is applied to occasions related to brushless motor drive in industrial production.
Background
With the development of new energy electric vehicles, the brushless dc motor has been the key point in the development of electric vehicles in recent years as the power source of electric vehicles. Brushless DC motor bldcm (brushless DC motor) has the characteristics of small volume, light weight and high efficiency, and is an electronically commutated DC motor. Because the electronic commutation is adopted, the advantages of the common direct current motor are kept in performance, and most of the defects caused by mechanical commutation of the brush direct current motor are overcome. At present, an electric automobile has certain requirements on the commutation and the driving of a brushless motor in the aspect of driving and running control, and the output characteristic of the motor is adapted to the requirement of the dynamic characteristic of the automobile. Generally, the vehicle speed change range is large, the load torque changes violently, and the acceleration and deceleration are frequent in the vehicle running process, so that the electric vehicle is required to have high reliability and stability for the drive control of the brushless motor, and especially, the motor torque output is required to be stable in the high-speed running process so as to ensure the running safety, which is very important.
However, most of the drive control of the brushless dc motor in China only simply applies the principle of three-phase inverter bridge drive, such as the "brushless dc motor drive circuit" invented by zhangwei et al, patent No. 201710396028.5, the invented circuit can realize real-time speed regulation control of the brushless dc motor, but cannot ensure the output stability at each commutation frequency, i.e. cannot ensure the stability of torque at low speed and the stability of rotation speed at high speed, and cannot meet the requirements of the current electric vehicle application.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a driving waveform design system of a direct current brushless motor, which takes a microcontroller as a core and consists of a power supply management module, an isolation module, a digital-to-analog conversion control module, an operational amplification module, a three-phase six-bridge driving module and a current detection module. The brushless motor is driven by adopting the modulated driving signal to generate the driving waveform which accords with the running characteristic of the brushless motor, and the problem that the current brushless motor is not stable and reliable in driving control is greatly solved.
The technical scheme of the invention is a motor waveform driving control scheme, and the system takes a microcontroller as a core and consists of a power supply management module, an isolation module, a digital-to-analog conversion control module, an operational amplification module, a three-phase six-bridge driving module and a current detection module; the power supply management module is respectively connected with the microcontroller, the isolation module, the digital-to-analog conversion control module, the operational amplification module, the three-phase six-bridge driving module and the current detection module; the output end of the microcontroller is connected with the input end of the isolation module, and the input end of the microcontroller is connected with the output end of the isolation module; the output end of the isolation module is connected with the input end of the digital-to-analog conversion control module; the output end of the digital-to-analog conversion control module is connected with the input end of the operational amplification module; the output end of the operational amplification module is connected with the input end of the three-phase six-bridge driving module; the output end of the current detection module is connected with the input end of the isolation module;
the power supply management module is used for enabling a single switch power supply to generate a digital power supply part and an analog power supply part through a DC-DC isolation power supply and respectively supplying power to the main control part and the analog driving part; the digital power supply part further reduces the voltage to supply power for the microcontroller and the isolation module, and the analog power supply part further reduces the voltage to supply power for the isolation module, the digital-to-analog conversion control module, the operational amplification module and the three-phase six-bridge driving module;
the microcontroller is a system core, and a timer module, an interrupt response module and an analog-to-digital conversion module are arranged in the microcontroller. Firstly, a universal timer is used for generating three upper bridge arm square wave driving signals with the frequency of F, and for a brushless direct current motor, the relation between the theoretical rotating speed n and the pole pair number P and the commutation frequency F per second is as follows:
and because the brushless direct current motor adopts three-phase Hall position feedback, the relationship between the frequency F of the square wave driving signal of the upper bridge arm and the rotating speed n thereof is as follows:
the microcontroller judges the position of the current rotor according to three-phase Hall signals HA, HB and HC fed back by external interruption, and simultaneously generates three-way bridge arm modulation signals and a lower bridge arm square wave control signal according to the three-phase Hall signals, wherein the frequency F of the three-way bridge arm modulation signals and the lower bridge arm square wave control signals is obtained by the formulas (1) and (2); because the phase difference between the three-phase Hall signals HA, HB and HC is 120 degrees, three paths of upper bridge arm modulation signals and lower bridge arm square wave control signals with the phase difference of 120 degrees can be generated according to the three-phase Hall signals. And the microcontroller collects the current real-time speed and real-time current by combining the on-chip digital-to-analog conversion controller with the peripheral current detection module so as to monitor the real-time running state of the motor.
The isolation module adopts multi-channel high-speed magnetic coupling isolation, so that the high-frequency signals are not distorted during isolation, and the level conversion of the controller signals and the driving signals is realized. The signal source is used for isolating the signal source of the microcontroller from the analog driving signal source so as to ensure that the microcontroller is not interfered by a preceding stage analog driving part. The isolation module comprises an output isolation part and an input isolation part, wherein the output isolation part comprises driving signals and modulation signals of three upper bridge arms and driving signals of three lower bridge arms; the input isolation part comprises three paths of Hall level signals with phase difference of 120 degrees and also comprises a voltage signal converted by the current acquisition module.
The digital-to-analog conversion control module is used for generating three upper bridge arm modulation signal pairs with 120-degree phase difference according to the microcontrollerThe original three upper bridge arm carrier control signals are respectively modulated, and three upper bridge arm modulation wave signals with 120-degree phase difference are finally generated. The modulation method adopted by the technical scheme is amplitude modulation, and in order to obtain the waveform after signal multiplication, a digital-to-analog conversion controller is selected and the reference voltage V of the digital-to-analog conversion controller is controlledREFThe frequency F of the above bridge arm carrier control signal. Since the digital-to-analog conversion controller finally outputs a current signal, the current signal needs to be converted into a voltage signal by combining an operational amplifier. And combining a data manual thereof to obtain the relation between the conversion voltage value Vout and the input digital quantity D as follows:
where n is the conversion accuracy of the digital-to-analog conversion controller, and the size of D is determined by the interface level of its digital input terminal.
The operational amplification module is composed of two parts, wherein one part is a same-phase amplifier, the other part is a voltage follower, and the operational amplification module is used for further amplifying three paths of upper bridge arm modulation wave signals and lower bridge arm control signals with 120-degree phase difference to obtain three paths of upper bridge arm and lower bridge arm driving signals with 120-degree phase difference, and meanwhile, the isolation between a rear-stage driving signal and a front-stage control signal is realized.
The current detection module converts a current signal acquired by the sampling circuit into a voltage signal, amplifies the voltage signal, converts the voltage signal into an analog-to-digital signal and transmits the analog-to-digital signal back to the microcontroller for processing; the current detection module comprises a sampling circuit, a voltage reference source circuit, a differential amplification circuit, a voltage comparison circuit and an AD (analog-to-digital) conversion circuit;
the three-phase six-bridge driving module is used for amplifying power according to three upper bridge arm and lower bridge arm driving signals with 120-degree phase difference after operation amplification, and finally generating a three-phase driving waveform to realize the reversing and rotating speed control of the brushless motor. The module also includes a half-bridge drive waveform control module and a power amplification module. The half-bridge driving waveform control module comprises a fast recovery diode, a bleeder resistor and a bootstrap capacitor. And the fast recovery diode is used for providing a forward current channel for charging the bootstrap capacitor when the upper bridge arm field effect transistor is turned off, and is also used for preventing current from reversely flowing into the voltage of the control end when the upper bridge arm field effect transistor is turned on. The bleeder resistor is used for quickly switching off the upper bridge arm, reducing switching loss and shortening the unstable process of the field effect transistor during switching off, and is also used for avoiding the phenomenon that the upper bridge arm and the lower bridge arm are penetrated through due to the coupling rise of the grid voltage of the upper bridge arm when the upper bridge arm is quickly switched on.
The bootstrap capacitor, the parameters of which directly affect the stability of the final output driving waveform, has a minimum capacitance C given by the following formula:
wherein Q isGIs the grid charge of the upper bridge arm FET, IQBSIs quiescent current, Q, of the upper bridge arm drive circuitLSTo drive the charge requirements of level shifting circuits in ICs, ICBSLeakage current of bootstrap capacitor, VCCFor loading upper and lower bridge voltage drops, VFFor fast recovery diode forward voltage drop, VLSAnd f is the working frequency, and is the voltage drop of a lower bridge arm device or the voltage drop of an upper bridge arm load.
Compared with the existing direct current brushless motor drive control, the novel drive waveform control system has the advantages that the problem that the motor is unstable at high speed and low speed is effectively solved, the response capability and the loading capability of the motor are improved, digital-analog isolation and overcurrent protection are realized, and the reliability of the whole control scheme is ensured. The system has good robustness, and can meet the requirements of safety and stability of the existing new energy electric vehicle. Can be more applied to various industrial occasions, and improves the economic benefit.
Drawings
Fig. 1 is a schematic circuit block diagram of a dc brushless motor driving waveform design system.
Fig. 2 is a schematic diagram of the digital-to-analog conversion control module and the operational amplification module.
Fig. 3 is a schematic circuit diagram of a three-phase six-bridge driving module.
Fig. 4 is a schematic circuit diagram of the current detection module.
FIG. 5 is a flow chart of the system software for designing the driving waveform of the brushless DC motor.
Detailed Description
The following detailed description of the invention refers to the accompanying drawings.
As shown in fig. 1, the design system of the present invention uses a microcontroller as a core and is composed of a power management module, an isolation module, a digital-to-analog conversion control module, an operational amplification module, a three-phase six-bridge driving module, and a current detection module.
The microcontroller is a system core, and a timer module, an interrupt response module and an analog-to-digital conversion module are arranged in the microcontroller. Firstly, a universal timer is used for generating three upper bridge arm carrier control signals with the frequency F, and the frequency F is obtained by the formulas (1) and (2). And then, the position of the current rotor is judged according to three-phase Hall signals HA, HB and HC which are fed back by the external interrupt of the controller, and because the phase difference among the three-phase Hall signals HA, HB and HC is 120 degrees, three paths of upper bridge arm modulation signals and lower bridge arm square wave control signals with the phase difference of 120 degrees can be generated according to the three-phase Hall signals. Meanwhile, the microcontroller collects the current real-time speed and real-time current by combining the on-chip digital-to-analog conversion controller with the peripheral current detection module so as to monitor the real-time running state of the motor.
The power management module is used for isolating a single switching power supply +24V from the power module through the DC-DC to generate a digital power supply part and an analog power supply part, the digital power supply part supplies power to the microcontroller +3.3V and the isolation module +5V through further voltage reduction, the analog power supply part further reduces the voltage to supply power to the DAC (digital-to-analog converter) chip +5V, the operational amplifier +15V supplies power, the half-bridge driving chip +15V supplies power, and the current detection chip +5V supplies power.
The isolation module comprises an output isolation part and an input isolation part, and the isolation module adopts a high-speed magnetic coupling isolation chip ADuM1401 to ensure the response speed of the whole system. The output isolation part comprises driving signals and modulation signals of three upper bridge arms and driving signals of three lower bridge arms; the input isolation part comprises three paths of Hall level signals with phase difference of 120 degrees and also comprises a voltage signal converted by the current acquisition module.
Fig. 2 shows an example of the digital-to-analog conversion control module and the operational amplifier module circuit according to the present invention, which is a core of the generation of the entire driving control waveform. Firstly, the original three upper bridge arm carrier control signals are respectively modulated according to three upper bridge arm modulation signals with 120-degree phase difference generated by a microcontroller, and finally three upper bridge arm modulation wave signals with 120-degree phase difference are generated. The modulation method adopted by the scheme is amplitude modulation, namely, a high-frequency carrier signal is multiplied by a low-frequency modulation signal, so that the amplitude of the high-frequency signal is changed along with the change of the low-frequency modulation signal. In this embodiment, a DAC0832 digital-to-analog conversion chip is selected and V thereof is controlledREFThe pin level is changed at a set frequency F, and V is shown by the above equation (3)outIs D and VREFAnd (4) multiplying the two. And this property is exactly in line with the principle of waveform amplitude modulation.
Fig. 3 shows an exemplary three-phase six-bridge driving module circuit according to the present invention, which is configured to amplify the power of three modulated upper and lower bridge arm driving signals and generate a three-phase driving waveform, and includes a half-bridge driving waveform control circuit and a power amplifying circuit. The key of the half-bridge driving waveform control circuit is how to realize the driving of an upper bridge arm. As above C24 in fig. 3 is the bootstrap capacitor, D5 is the fast recovery diode, and the input drive waveform is modulated in the upper bridge. When Q1 is off, the VS potential returns to zero due to freewheeling in Q2 when C24 passes VCCAnd D5. When the input signal HIN is on, the drive of the upper bridge arm is powered by C24. Since the voltage of C24 does not change, VB will float as VS increases, so C24 is referred to as a bootstrap capacitor. The circuit charges C24 every cycle of the input drive waveform, maintaining its voltage substantially constant. The function of D5 is to provide a forward current path for C24 charging when Q1 is turned off and to prevent current from flowing in reverse direction to control terminal voltage V when Q1 is turned onCC。R1The function of 1 is to make the upper bridge turn off rapidly, reduce the switching loss, shorten the unstable process when MOSFET turns off. The function of R14 is to avoid punch-through of the upper and lower bridges caused by coupling of the gate voltage of the lower bridge when the upper bridge is turned on rapidly.
Meanwhile, a bootstrap capacitor in the half-bridge driving waveform control circuit has a large influence on the stability of waveform output, the capacitor is charged by the circuit in each driving period, and the potential difference at the point can be kept unchanged by the reverse cut-off action of the diode. In practice due to the gate charge Q of the upper bridge MOSFETGQuiescent current I of upper bridge driving circuitQBSAnd charge requirement Q of level conversion circuit in driving ICLSAnd leakage current I of bootstrap capacitorCBSThe voltage fluctuation of the bootstrap capacitor influences the output of the front stage due to the existence of the four reasons, so that the bootstrap capacitor must be capable of providing the above charges in each switching period to keep the voltage of the bootstrap capacitor basically unchanged. Otherwise VBS will have a large voltage ripple and may be below the under-voltage level, causing the upper bridge to have no output and stop operating.
In the embodiment, reasonable bootstrap capacitor capacity is selected according to formula (4), so that the potential fluctuation at two ends of the bootstrap capacitor is less than 0.1%, and the stability of driving waveform output is greatly ensured.
Fig. 4 shows an exemplary current detection module circuit according to the present invention, which converts the current signal collected by the ACS712 into a voltage signal, amplifies the voltage signal, converts the voltage signal into an analog signal, and transmits the analog signal back to the microcontroller for processing. The voltage sampling circuit mainly comprises a sampling circuit, a voltage reference source circuit, a differential amplification circuit, a voltage comparison circuit and an AD (analog-to-digital) conversion circuit. The operational amplification circuit can adjust the amplification factor, and further, the current conversion precision and the threshold value are adjustable. Because the last converted voltage signal is an analog signal, AD (analog-to-digital) conversion is added, the analog voltage signal is converted into a digital signal and then can be transmitted back to the microcontroller through the isolation module, and the working stability of the whole design system is ensured again.
Fig. 5 shows a flow chart of a system software for designing a driving waveform of a dc brushless motor according to the present invention.
Firstly, system initialization configuration is carried out, wherein the system initialization configuration comprises timer initialization, external DAC initialization and external ADC initialization, then external DAC conversion and external ADC conversion are respectively started, then three paths of upper bridge arm driving square waves with the frequency of F are generated through a timer, external interrupt signals generated by three-phase Hall signals HA, HB and HC are respectively detected, level inversion of three paths of ABC modulation signals and lower bridge arm driving signals is respectively determined according to the three-phase Hall signals, and meanwhile, the current magnitude and a set threshold value of a system are detected in real time, and whether overcurrent protection is carried out or not is determined.
The embodiment was tested using the driving waveform design system of the dc brushless motor according to the present invention, which is a 57BLDC006 type motor. The main control of the system adopts an stm32f103vet6 chip, an external power supply adopts commercial power, and the commercial power is rectified and reduced in voltage through a +24V switching power supply to obtain an input power supply required by the system. The system generates three paths of driving signals through Timer3 of a microcontroller, performs waveform modulation through a digital-to-analog conversion module consisting of an 8-bit D/A conversion integrated chip DAC0832, and finally performs motor driving control through a three-phase six-bridge driving module consisting of a half-bridge driving chip IR 2101S. The fluctuation of the driving waveform obtained in the experimental embodiment is less than 0.1%, and the smooth change of the rotating speed can be still ensured during the fast switching of high and low speeds.
The invention can effectively solve the problem that the direct current brushless motor is unstable in high and low speed driving, so that the brushless motor has good robustness, can meet the requirements of safety and stability of the existing new energy electric vehicle, can be more applied to various industrial occasions, and improves the economic benefit.
Claims (1)
1. A driving waveform design system of a direct current brushless motor is characterized in that the system takes a microcontroller as a core and consists of a power management module, an isolation module, a digital-to-analog conversion control module, an operational amplification module, a three-phase six-bridge driving module and a current detection module; the digital output end of the power management module is connected with the microcontroller and the isolation module, and the analog output end of the power management module is connected with the isolation module, the digital-to-analog conversion control module, the operational amplification module, the three-phase six-bridge drive module and the current detection module respectively; the output end of the microcontroller is connected with the input end of the isolation module, and the input end of the microcontroller is connected with the output end of the isolation module; the output end of the isolation module is connected with the input end of the digital-to-analog conversion control module; the output end of the digital-to-analog conversion control module is connected with the input end of the operational amplification module; the output end of the operational amplification module is connected with the input end of the three-phase six-bridge driving module; the output end of the current detection module is connected with the input end of the isolation module;
the power supply management module is used for generating a digital power supply part and an analog power supply part from a single switching power supply +24V through an isolated power supply DC-DC, and respectively supplying power to the main control part and the analog driving part; the digital power supply part further reduces the voltage to supply power to the microcontroller plus 3.3V and the isolation module plus 5V, the analog power supply part further reduces the voltage to supply power to the DAC (digital-to-analog converter) plus 5V, the operational amplifier plus 15V, the half-bridge driving chip plus 15V and the current detection chip plus 5V;
the microcontroller is a system core, and a timer module, an interrupt response module and an analog-to-digital conversion module are arranged in the microcontroller; firstly, a universal timer is used for generating three upper bridge arm square wave driving signals with the frequency of F, and for a brushless direct current motor, the relation between the theoretical rotating speed n and the pole pair number P and the commutation frequency F per second is as follows:
and because the brushless direct current motor adopts three-phase Hall position feedback, the relationship between the frequency F of the square wave driving signal of the upper bridge arm and the rotating speed n thereof is as follows:
the microcontroller judges the position of the current rotor according to three-phase Hall signals HA, HB and HC fed back by external interruption, and simultaneously generates three-way bridge arm modulation signals and a lower bridge arm square wave control signal according to the three-phase Hall signals, wherein the frequency F of the three-way bridge arm modulation signals and the lower bridge arm square wave control signals is obtained by the formulas (1) and (2); because the phase difference between the three-phase Hall signals HA, HB and HC is 120 degrees, three paths of upper bridge arm modulation signals and lower bridge arm square wave control signals with the phase difference of 120 degrees can be generated according to the three-phase Hall signals. And the microcontroller collects the current real-time speed and real-time current by combining the on-chip digital-to-analog conversion controller with the peripheral current detection module so as to monitor the real-time running state of the motor.
The isolation module adopts multi-channel high-speed magnetic coupling isolation, so that the high-frequency signals are not distorted during isolation, and the level conversion of the controller signals and the driving signals is realized. For use in microfabrication; the signal source is used for isolating the signal source of the microcontroller from the analog driving signal source so as to ensure that the microcontroller is not interfered by a preceding stage analog driving part; the isolation module comprises an output isolation part and an input isolation part, wherein the output isolation part comprises driving signals and modulation signals of three upper bridge arms and driving signals of three lower bridge arms; the input isolation part comprises three paths of Hall level signals with phase difference of 120 degrees and also comprises voltage signals converted by the current acquisition module;
the digital-to-analog conversion control module is used for respectively modulating original three upper bridge arm carrier control signals according to three upper bridge arm modulation signals with 120-degree phase difference generated by the microcontroller, and finally generating three upper bridge arm modulation wave signals with 120-degree phase difference by adopting an amplitude modulation method; selecting a digital-to-analog conversion controller and controlling a reference voltage V thereof to obtain a waveform obtained by multiplying signalsREFThe frequency F of the bridge arm carrier control signal is changed; because the digital-to-analog conversion controller finally outputs a current signal, the current signal needs to be converted into a voltage signal by combining an operational amplifier; and combining a data manual thereof to obtain the relation between the conversion voltage value Vout and the input digital quantity D as follows:
wherein n is the conversion precision of the digital-to-analog conversion controller, and the size of D is determined by the interface level of the digital input end;
the operational amplification module consists of two parts, wherein one part is a same-phase amplifier, and the other part is a voltage follower, and the operational amplification module is used for further amplifying three paths of upper bridge arm modulation wave signals and lower bridge arm control signals with 120-degree phase difference to obtain three paths of upper bridge arm driving signals and lower bridge arm driving signals with 120-degree phase difference, so that the rear-stage driving signals and the front-stage control signals are isolated;
the current detection module converts a current signal acquired by the sampling circuit into a voltage signal, amplifies the voltage signal, converts the voltage signal into an analog-to-digital signal and transmits the analog-to-digital signal back to the microcontroller for processing; the current detection module comprises a sampling circuit, a voltage reference source circuit, a differential amplification circuit, a voltage comparison circuit and an AD (analog-to-digital) conversion circuit;
the three-phase six-bridge driving module is used for amplifying power according to three upper bridge arm and lower bridge arm driving signals with 120-degree phase difference after operation amplification, and finally generating a three-phase driving waveform to realize the reversing and rotating speed control of the brushless motor; the module also comprises a half-bridge driving waveform control module and a power amplification module; the half-bridge driving waveform control module comprises a fast recovery diode, a bleeder resistor and a bootstrap capacitor; the fast recovery diode is used for providing a forward current channel for charging the bootstrap capacitor when the upper bridge arm field effect transistor is turned off, and is also used for preventing current from reversely flowing into the voltage of the control end when the upper bridge arm field effect transistor is turned on; the bleeder resistor is used for quickly switching off the upper bridge arm, reducing switching loss and shortening the unstable process of the field effect transistor during switching off, and is also used for avoiding the phenomenon that the upper bridge arm and the lower bridge arm are penetrated through due to the coupling rise of the grid voltage of the upper bridge arm when the upper bridge arm is quickly switched on; the bootstrap capacitor, the parameters of which directly affect the stability of the final output driving waveform, has a minimum capacitance C given by the following formula:
wherein Q isGIs the grid charge of the upper bridge arm FET, IQBSIs quiescent current, Q, of the upper bridge arm drive circuitLSFor driving level-shifting circuits in ICsCharge requirement of the circuit, ICBSLeakage current of bootstrap capacitor, VCCFor loading upper and lower bridge voltage drops, VFFor fast recovery diode forward voltage drop, VLSAnd f is the working frequency, and is the voltage drop of a lower bridge arm device or the voltage drop of an upper bridge arm load.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114966148A (en) * | 2022-05-24 | 2022-08-30 | 国网山东省电力公司营销服务中心(计量中心) | High-precision three-phase alternating current standard source for digital full-waveform recovery and working method |
-
2019
- 2019-12-16 CN CN201911290035.2A patent/CN110971157A/en active Pending
Non-Patent Citations (3)
| Title |
|---|
| 徐惠等: "《基于compactRIO的直流无刷电机控制***》", 《电子设计工程》 * |
| 马瑞卿等: "《基于无刷直流电机的舵机试验器研制》", 《电机与控制应用》 * |
| 黄磊: "《基于DSP的无刷直流电机运动控制***研究》", 《中国优秀硕士学位论文全文数据库（电子期刊）》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114966148A (en) * | 2022-05-24 | 2022-08-30 | 国网山东省电力公司营销服务中心(计量中心) | High-precision three-phase alternating current standard source for digital full-waveform recovery and working method |
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Application publication date: 20200407 |