CN117134681A - Motor driving device with bus voltage stabilizing function - Google Patents

Motor driving device with bus voltage stabilizing function Download PDF

Info

Publication number
CN117134681A
CN117134681A CN202310734914.XA CN202310734914A CN117134681A CN 117134681 A CN117134681 A CN 117134681A CN 202310734914 A CN202310734914 A CN 202310734914A CN 117134681 A CN117134681 A CN 117134681A
Authority
CN
China
Prior art keywords
voltage
input
current
feedforward
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310734914.XA
Other languages
Chinese (zh)
Inventor
安伟国
韦炳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hefei Oniu Intelligent Equipment Co ltd
Original Assignee
Hefei Oniu Intelligent Equipment Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hefei Oniu Intelligent Equipment Co ltd filed Critical Hefei Oniu Intelligent Equipment Co ltd
Priority to CN202310734914.XA priority Critical patent/CN117134681A/en
Publication of CN117134681A publication Critical patent/CN117134681A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0095—Hybrid converter topologies, e.g. NPC mixed with flying capacitor, thyristor converter mixed with MMC or charge pump mixed with buck
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/157—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with digital control
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • 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
    • H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
    • H02P21/0003—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control
    • 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
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention discloses a motor digital control driving device with bus voltage stabilizing function, comprising: the rectification module is used for rectifying the alternating voltage into a bus direct current input voltage; the input end of the boosting circuit is connected to the output end of the rectifying module, and the output end of the boosting circuit is connected to the input end of the half-bridge inversion module; the half-bridge inverter module is used for driving and controlling the motor, and the output end of the half-bridge inverter module is connected to the motor; the motor is used for providing a power source for the concrete vibrator or the washing machine; and the control module is used for controlling the voltage boosting circuit to boost the voltage when the voltage is reduced or the output power of the motor is reduced. When the voltage is reduced, the rotation speed and the output power are not reduced to ensure the stability of output, and meanwhile, when the reduction of the output power is detected, the voltage is boosted in time to ensure the stability of the output power of the motor.

Description

Motor driving device with bus voltage stabilizing function
Technical Field
The invention relates to the technical field of boosting, in particular to a motor driving device with a bus voltage stabilizing function.
Background
For the concrete vibrator with built-in motor, the traditional control implementation topology can rectify the alternating current signal of the commercial power into direct current voltage through a rectification circuit or directly introduce direct current input voltage, and then drive and control the tool action mechanism through technologies such as frequency conversion and the like.
The correspondence between the rectified DC bus voltage value and the input AC voltage value is as follows:
V dc ＝K p *V ac_rms
wherein: v (V) dc The voltage value of the direct current bus after rectification is simply called bus voltage;
V ac_rms is an effective value of the input alternating voltage;
K p the peak value coefficient of the effective value of the alternating voltage and the peak value of the alternating voltage, which is simply called peak value coefficient, is the standard sine alternating voltage
Therefore, the DC bus voltage obtained by the topology is influenced by the input voltage, and the DC bus voltage fluctuates along with the input voltage, so that the driving control of a later-stage actuating mechanism (comprising a motor) is interfered, and the control difficulty is increased. Especially when the input voltage is low or the peak coefficient of the input alternating voltage is low, the voltage value V of the bus after rectification dc ＝K p *V ac_rms When V ac_rms When lower, or K p At a lower level, V is caused dc And is low, so that the output capability of the rear-stage actuating mechanism is limited by the lowest direct current voltage at the moment. In order to ensure output stability in the conventional control implementation, the rotation speed and the output power are usually actively reduced to ensure output stability, i.e. the derating output.
Meanwhile, in order to balance the working condition of low input voltage, in order to ensure that the system can still work stably under the condition of low voltage input, the matched motor needs to weaken the magnetic field force of the motor on design parameters so as to adapt to the working condition of low input voltage, thereby reducing the overall efficiency of the system.
Disclosure of Invention
The invention aims to provide a motor driving device with a bus voltage stabilizing function, which solves the following technical problems:
in order to ensure output stability, the conventional motor voltage stabilizing device generally actively reduces the rotation speed and the output power to ensure output stability, namely, the output is reduced, and the motor of a concrete vibrator or a washing machine which needs to keep larger output power is seriously affected.
The aim of the invention can be achieved by the following technical scheme:
motor drive device of area busbar voltage steady voltage function includes:
the rectification module is used for rectifying the alternating voltage into direct current input voltage and transmitting the direct current input voltage to the passive boost circuit;
the input end of the boost circuit is connected to the output end of the rectifying module, and the output end of the boost circuit is connected to the input end of the half-bridge inversion module; the input voltage of the half-bridge inversion module is bus voltage;
the half-bridge inverter module is used for driving and controlling the motor, and the output end of the half-bridge inverter module is connected to the motor;
the motor is used for providing a power source for the concrete vibrator or the washing machine;
the digital control module is used for controlling the voltage boosting circuit to boost the voltage when the voltage is reduced or the output power of the motor is reduced; when the motor is in a generator state and the motor has no influence on the bus voltage, the control module controls the boost circuit to boost the bus voltage to be 1.42 times greater than the effective value of the power input alternating voltage.
As a further scheme of the invention: the boost circuit is configured as an active boost circuit.
As a further scheme of the invention: the active Boost circuit is configured as a Boost PFC Boost circuit comprising: inductance Lpfc, diode D1, MOD tube S1, capacitor C1 and capacitor Cbus;
the output end of the rectifying module is connected in parallel with two ends of a capacitor C1, a first end of the capacitor C1 is connected to an anode of a diode D1 through an inductor Lpfc, a second end of the capacitor C1 is connected to a first end of a resistor R1, a drain electrode of a MOD tube S1 is connected between the inductor Lpfc and the anode of the diode D1, a source electrode of the MOD tube S1 is connected to a first end of a resistor R2, a second end of the resistor R2 is connected to a second end of the resistor R1, a capacitor Cbus is connected in parallel between a connection point of the second end of the resistor R2 and the second end of the resistor R1 and a cathode of the diode D1, and two ends of the capacitor Cbus are connected to an input end of the half-bridge inverter module in parallel.
As a further scheme of the invention: the active boost circuit is arranged as a full-bridge rectifying boost circuit.
As a further scheme of the invention: the boost circuit is configured as a passive boost circuit.
As a further scheme of the invention: after the control module samples alternating current input voltage Vg, alternating current input current Ig and direct current bus voltage Vdc of the boost circuit, a PFC control algorithm is used for establishing a PFC double-loop control loop through the collected alternating current input voltage Vg, alternating current input current Ig and direct current bus voltage Vdc, the direct current bus voltage and the input alternating current are controlled, alternating current PF value control and PWM control signals are obtained, and voltage boosting is carried out through the boost circuit.
As a further scheme of the invention: the control module controls the boost circuit to boost and stabilize the bus voltage through the active PFC, and the method comprises the following steps:
obtaining an amplitude reference of input alternating current through PI calculation according to a difference value between a set target direct current bus voltage value and an actually sampled bus voltage;
multiplying the input alternating current amplitude reference by the waveform reference of the input alternating current to obtain an instantaneous value reference of the input alternating current; and (3) obtaining an output control PWM signal by calculating a difference value obtained by subtracting the sampled input alternating current value from the instantaneous value reference of the input alternating current through a PI controller.
As a further scheme of the invention: the control module comprises:
the input sampling unit is used for sampling the busbar direct current input voltage Vg and the busbar direct current input current Ig of the boost circuit and transmitting sampling information to the voltage feedforward type digital vector control unit;
an output sampling unit for three-phase current i at the output end of the half-bridge inversion module a 、i b And i c Sampling, namely estimating the position and the speed of the motor through an observer by using the current sampling, and transmitting the position and the speed of the motor to a voltage feedforward type digital vector control unit;
the voltage feedforward type digital vector control unit is used for receiving bus direct current input voltage Vg, bus direct current input current Ig of the boost circuit and three-phase current i of the output end of the half-bridge inversion module a 、i b And i c And the position and speed data of the motor are subjected to proportional and integral control in a voltage feedforward type digital vector control current loop to obtain feedforward input voltage and feedforward output voltage.
As a further scheme of the invention: in a voltage feedforward type digital vector control current loop, obtaining a feedforward input voltage and a feedforward output voltage through proportional and integral control comprises the following steps:
s1: performing a speed loop PI control algorithm through the received speed measurement data to obtain a PFC inner loop reference current, and simultaneously obtaining a feedforward current in the PFC inner loop through the PI control algorithm according to a busbar direct current input voltage Vg and a busbar direct current input current Ig;
s2: according to the position data of the motor, a current reference value is obtained through Clark and Park conversion calculation;
s3: according to the feedforward current and the current reference value, in a voltage feedforward type digital vector control current loop, a feedforward input voltage and a feedforward output voltage are obtained through proportional terms and integral in a PI regulator of the voltage feedforward type digital vector control current loop;
s4: the feedforward input voltage and the feedforward output voltage are transmitted to the SVPWM modulator.
As a further scheme of the invention: the control module further comprises:
the bus voltage control unit obtains a bus voltage effective value by measuring the voltage VC1 on the capacitor C1 in the voltage boosting circuit and transmits the bus voltage effective value to the PWM modulator; the bus voltage is calculated by the following formula:
wherein V is dc Is the effective value of bus voltage, V c1 For the voltage across the capacitor C1, d 0 Generating a PWM wave with a duty ratio and a frequency f being 2 times of the working frequency of the inverter for the bus voltage control loop;
the PWM modulator is used for generating PWM waves according to the bus voltage effective value calculated by the bus voltage control unit and transmitting the PWM waves to the driving signal synthesis unit;
the SVPWM modulator is used for generating SVPWM waves according to the feedforward input voltage and the feedforward output voltage input by the voltage feedforward type digital vector control unit and transmitting the SVPWM waves to the driving signal synthesis unit;
and the driving signal synthesis unit is used for directly inserting the SVPWM wave generated by the SVPWM modulator into the PWM wave generated by the PWM modulator, generating a PWM control signal and transmitting the generated PWM control signal to the half-bridge inversion module.
As a further scheme of the invention: generating a duty cycle d by a bus voltage control loop 0 Is less than the zero vector of the feedforward output voltage generated SVPWM wave.
The invention has the beneficial effects that:
(1) The invention controls the input voltage above a specific voltage through the control module and the booster circuit, and stabilizes the output voltage for the later driving part; therefore, stable output of the rear-stage driving mechanism is realized, the rotation speed and the output power are not reduced to ensure stable output when the voltage is reduced, and meanwhile, the voltage is boosted in time when the reduction of the output power is detected to ensure the stability of the output power of the motor; and, to the electric tool that actuating mechanism is the motor, the motor that matches can select reinforcing magnetic force matches to improve system overall efficiency, promote system stability.
(2) According to the invention, after the motor exits from the generator state and the influence of the motor on the boosting of the bus voltage is eliminated, the control module controls the boosting circuit to boost the bus voltage to be 1.42 times greater than the effective value of the input alternating voltage of the power supply; and the control module is used for controlling Vbus to be larger than Vac by 1.42 times, so that the phenomenon that the output power of the motor is influenced due to lower bus voltage when the motor is in a motor state is avoided, and the stable operation of the motor is ensured.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is one of the circuit diagrams of the active boost circuit of the present invention;
FIG. 2 is a second circuit diagram of the active boosting circuit of the present invention;
FIG. 3 is a control schematic of the control module of the present invention;
fig. 4 is a control schematic diagram of the voltage feedforward type digital vector control unit of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1-4, the present invention is a motor driving device with bus voltage stabilizing function, comprising:
the rectification module is used for rectifying the alternating voltage into direct current input voltage and transmitting the direct current input voltage to the passive boost circuit;
the input end of the boost circuit is connected to the output end of the rectifying module, and the output end of the boost circuit is connected to the input end of the half-bridge inversion module; the input voltage of the half-bridge inversion module is bus voltage;
the half-bridge inverter module is used for driving and controlling the motor, and the output end of the half-bridge inverter module is connected to the motor;
the motor is used for providing a power source for the concrete vibrator or the washing machine;
the control module is used for controlling the voltage boosting circuit to boost the voltage when the voltage is reduced or the output power of the motor is reduced; when the motor is in a generator state and the motor has no influence on the bus voltage, the control module controls the boost circuit to boost the bus voltage to be 1.42 times greater than the effective value of the power input alternating voltage.
Specifically, in this embodiment, the effective value of the ac voltage input by the power supply is Vac, and Vbus is greater than vac×1.42 after the influence on the bus voltage caused by the motor in the generator state is eliminated; by controlling the bus voltage to be larger than Vac 1.42, the energy of the motor is prevented from lifting the bus when the motor is in a generator state, the output power of the motor is influenced, and the stable operation of the motor is ensured.
Meanwhile, the traditional frequency conversion control device does not comprise a direct current bus voltage stabilizing circuit and a control device. When the input alternating voltage is too low, the bus voltage is not high enough, and in order to maintain stable output without stopping, the rotating speed of the motor must be reduced to ensure the response capability of the action mechanism to load fluctuation, so that the output capability is forced to be actively reduced, the power is weakened, and the system performance is reduced.
The input voltage is controlled above a specific voltage through the control module and the booster circuit, and the output voltage is stabilized for the later-stage driving part; therefore, stable output of the rear-stage driving mechanism is realized, when the voltage is reduced, the rotation speed and the output power are not reduced to ensure stable output, and meanwhile, when the reduction of the output power is detected, the voltage is boosted in time to ensure the stability of the output power of the motor.
When the input voltage is AC voltage, the boosting device can synchronously improve PF value and harmonic performance of the input AC current on the basis of realizing AC-DC conversion and boosting the DC voltage.
Example two
Referring to fig. 1-2, in one embodiment of the present invention, the boost circuit is configured as an active boost circuit.
Specifically, the boost circuit is configured as an active boost circuit, which can improve the boost efficiency, and has higher conversion efficiency compared with the traditional linear power converter because the active boost circuit adopts a power amplifier to increase the output voltage. Meanwhile, the voltage-boosting circuit is arranged as an active voltage-boosting circuit, so that low voltage drop can be realized, and the output voltage of the active voltage-boosting circuit can be higher than the input voltage, so that the voltage drop is smaller during high-current output, and the stability of the output is improved. Meanwhile, the booster circuit is arranged as an active booster circuit, so that a wide input and output voltage range can be realized, and the active booster circuit can realize the change of the proportion of input and output voltages by adjusting the gain of the power amplifier, so that the booster circuit has the advantage of the wide input and output voltage range. The active booster circuit has a high switching frequency, and therefore has remarkable effects of weight saving and miniaturization, and is excellent particularly in applications requiring high-frequency response.
Referring to fig. 1, in one embodiment of the present invention, the active Boost circuit is configured as a Boost PFC Boost circuit, which includes: inductance Lpfc, diode D1, MOD tube S1, capacitor C1 and capacitor Cbus;
the output end of the rectifying module is connected in parallel with two ends of a capacitor C1, a first end of the capacitor C1 is connected to an anode of a diode D1 through an inductor Lpfc, a second end of the capacitor C1 is connected to a first end of a resistor R1, a drain electrode of a MOD tube S1 is connected between the inductor Lpfc and the anode of the diode D1, a source electrode of the MOD tube S1 is connected to a first end of a resistor R2, a second end of the resistor R2 is connected to a second end of the resistor R1, a capacitor Cbus is connected in parallel between a connection point of the second end of the resistor R2 and the second end of the resistor R1 and a cathode of the diode D1, and two ends of the capacitor Cbus are connected to an input end of the half-bridge inverter module in parallel.
Specifically, after the rectification module rectifies alternating voltage into bus direct current input voltage, the boosting circuit boosts the bus direct current input voltage, and then the half-bridge inversion module supplies power to the motor, and the boosting circuit is used as an added front-stage voltage stabilizing circuit, so that input current PF value correction and input current harmonic control can be realized.
Referring to fig. 2, in one embodiment of the present invention, the active boost circuit is configured as a full-bridge rectifying boost circuit. Specifically, when the active boost circuit is set as a full-bridge rectifying boost circuit, the boost of the bus direct current input voltage can be realized under the action of the control module.
Referring to fig. 1 and 2, in one embodiment of the present invention, after the control module samples the ac input voltage Vg, the ac input current Ig, and the dc bus voltage Vdc of the boost circuit, a PFC control algorithm is used to establish a PFC dual-loop control loop through the collected ac input voltage Vg, the ac input current Ig, and the dc bus voltage Vdc, to control the dc bus voltage and the input ac current, to obtain an ac current PF value control signal and a PWM control signal, and to perform voltage boost through the boost circuit.
In one embodiment of the invention, the control module controls the boost circuit to boost and stabilize the bus voltage through the active PFC, and the control module comprises the following steps:
obtaining an amplitude reference of input alternating current through PI calculation according to a difference value between a set target direct current bus voltage value and an actually sampled bus voltage;
multiplying the input alternating current amplitude reference by the waveform reference of the input alternating current to obtain an instantaneous value reference of the input alternating current; and (3) obtaining an output control PWM signal by calculating a difference value obtained by subtracting the sampled input alternating current value from the instantaneous value reference of the input alternating current through a PI controller.
Example III
Referring to fig. 3-4, in one embodiment of the present invention, the boost circuit is configured as a passive boost circuit based on the first embodiment. Specifically, when the booster circuit is set as a passive booster circuit, the passive booster circuit can still boost the bus direct current input voltage under the action of the control module.
In one embodiment of the present invention, a control module includes:
the input sampling unit is used for sampling the busbar direct current input voltage Vg and the busbar direct current input current Ig of the booster circuit and transmitting sampling information to the voltage feedforward type digital vector control unit;
an output sampling unit for three-phase current i at the output end of the half-bridge inversion module a 、i b And i c Sampling, namely sampling the position and the speed of the motor, and transmitting the position and the speed of the motor to a voltage feedforward type digital vector control unit;
the voltage feedforward type digital vector control unit is used for receiving bus direct current input voltage Vg, bus direct current input current Ig of the boost circuit and three-phase current i of the output end of the half-bridge inversion module a 、i b And i c And the position and speed data of the motor are subjected to proportional and integral control in a voltage feedforward type digital vector control current loop to obtain feedforward input voltage and feedforward output voltage.
In one embodiment of the present invention, referring to fig. 3-4, in a voltage feedforward type digital vector control current loop, the feedforward input voltage and the feedforward output voltage are obtained through proportional and integral control, which comprises the following steps:
s1: performing a speed loop PI control algorithm through the received speed measurement data to obtain a PFC inner loop reference current, and simultaneously obtaining a feedforward current in the PFC inner loop through the PI control algorithm according to a busbar direct current input voltage Vg and a busbar direct current input current Ig;
s2: according to the position data of the motor, a current reference value is obtained through Clark and Park conversion calculation;
s3: according to the feedforward current and the current reference value, in a voltage feedforward type digital vector control current loop, a feedforward input voltage and a feedforward output voltage are obtained through proportional terms and integral in a PI regulator of the voltage feedforward type digital vector control current loop;
s4: the feedforward input voltage and the feedforward output voltage are transmitted to the SVPWM modulator.
In one embodiment of the present invention, the control module further includes:
the bus voltage control unit obtains a bus voltage effective value by measuring the voltage VC1 on the capacitor C1 in the voltage boosting circuit and transmits the bus voltage effective value to the PWM modulator; the bus voltage is calculated by the following formula:
wherein V is dc Is the effective value of bus voltage, V c1 For the voltage across the capacitor C1, d 0 Generating a PWM wave with a duty ratio and a frequency f being 2 times of the working frequency of the inverter for the bus voltage control loop;
the PWM modulator is used for generating PWM waves according to the bus voltage effective value calculated by the bus voltage control unit and transmitting the PWM waves to the driving signal synthesis unit;
the SVPWM modulator is used for generating SVPWM waves according to the feedforward input voltage and the feedforward output voltage input by the voltage feedforward type digital vector control unit and transmitting the SVPWM waves to the driving signal synthesis unit;
and the driving signal synthesis unit is used for directly inserting the SVPWM wave generated by the SVPWM modulator into the PWM wave generated by the PWM modulator, generating a PWM control signal and transmitting the generated PWM control signal to the half-bridge inversion module.
Specifically, the control module performs boost control including the following steps:
sampling a busbar direct current input voltage Vg and a busbar direct current input current Ig of a boost circuit through an input sampling unit; three-phase current i of output end of half-bridge inversion module of output sampling unit a 、i b And i c Sampling, and sampling the position and the speed of the motor;
the voltage feedforward type digital vector control unit carries out a speed loop PI control algorithm through the received speed measurement data to obtain a PFC inner loop reference current, and meanwhile, a feedforward current is obtained in the PFC inner loop through the PI control algorithm according to a busbar direct current input voltage Vg and a busbar direct current input current Ig; meanwhile, according to the position data of the motor, a current reference value is obtained through Clark conversion calculation;
the voltage feedforward type digital vector control unit obtains feedforward input voltage and feedforward output voltage in a voltage feedforward type digital vector control current loop according to feedforward current and a current reference value through proportional terms and integral in a PI regulator of the voltage feedforward type digital vector control current loop; the feedforward input voltage and the feedforward output voltage are transmitted to the SVPWM modulator.
The SVPWM modulator generates SVPWM waves according to the feedforward input voltage and the feedforward output voltage input by the voltage feedforward type digital vector control unit. The PWM modulator calculates bus voltage according to the bus voltage control unit to generate PWM waves.
The SVPWM wave generated by the SVPWM modulator is directly inserted into the PWM wave generated by the PWM modulator through the driving signal synthesis unit, a PWM control signal is generated, the generated PWM control signal is transmitted to the half-bridge inversion module, and the half-bridge inversion module is controlled to boost the motor through the boosting circuit.
Generating a duty cycle d by a bus voltage control loop 0 Is less than the zero vector of the feedforward output voltage generated SVPWM wave.
Specifically, the bus voltage control loop only generates a duty cycle d 0 And (3) directly inserting the SVPWM wave generated by the SVPWM modulator into the PWM wave generated by the PWM modulator to generate a PWM control signal. Direct insertion can be realized by adopting simple logic judgment, and when PWM generated by the bus voltage ring is high, all switching tube outputs are high. At the same time, attention is paid to the generating duty ratio d of the bus voltage control loop 0 Is less than the zero vector of the feedforward output voltage generated SVPWM wave.
In the description of the present invention, it should be understood that the terms "upper," "lower," "left," "right," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and for simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, as well as a specific orientation configuration and operation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.

Claims (10)

1. Take motor drive unit of busbar voltage steady voltage function, its characterized in that includes:
the rectification module is used for rectifying the alternating voltage into direct current input voltage and transmitting the direct current input voltage to the passive boost circuit;
the input end of the boost circuit is connected to the output end of the rectifying module, and the output end of the boost circuit is connected to the input end of the half-bridge inversion module; the input voltage of the half-bridge inversion module is bus voltage;
the half-bridge inverter module is used for driving and controlling the motor, and the output end of the half-bridge inverter module is connected to the motor;
the motor is used for providing a power source for the concrete vibrator or the washing machine;
the digital control module is used for controlling the voltage boosting circuit to boost the voltage when the voltage is reduced or the output power of the motor is reduced; after the motor exits from the generator state and the influence of the motor on the lifting of the bus voltage is eliminated, the control module controls the booster circuit to lift the bus voltage to be 1.42 times greater than the effective value of the input alternating voltage of the power supply.
2. The motor drive apparatus with a bus voltage stabilizing function according to claim 1, wherein the booster circuit is provided as an active booster circuit.
3. The motor drive with a bus voltage stabilizing function according to claim 2, wherein the active Boost circuit is provided as a Boost PFC Boost circuit comprising: inductance Lpfc, diode D1, MOD tube S1, capacitor C1 and capacitor Cbus;
the output end of the rectifying module is connected in parallel with two ends of a capacitor C1, a first end of the capacitor C1 is connected to an anode of a diode D1 through an inductor Lpfc, a second end of the capacitor C1 is connected to a first end of a resistor R1, a drain electrode of a MOD tube S1 is connected between the inductor Lpfc and the anode of the diode D1, a source electrode of the MOD tube S1 is connected to a first end of a resistor R2, a second end of the resistor R2 is connected to a second end of the resistor R1, a capacitor Cbus is connected in parallel between a connection point of the second end of the resistor R2 and the second end of the resistor R1 and a cathode of the diode D1, and two ends of the capacitor Cbus are connected to an input end of the half-bridge inverter module in parallel.
4. The motor drive apparatus with a bus voltage stabilizing function according to claim 2, wherein the active booster circuit is provided as a full-bridge rectifying booster circuit.
5. The motor drive apparatus with a bus voltage stabilizing function according to claim 1, wherein the booster circuit is provided as a passive booster circuit.
6. The motor driving device with a bus voltage stabilizing function according to any one of claims 2 to 4, wherein the control module samples an ac input voltage Vg, an ac input current I g and a dc bus voltage Vdc of the boost circuit, establishes a PFC double loop control loop through a PFC control algorithm through the collected ac input voltage Vg, ac input current I g and dc bus voltage Vdc, controls the dc bus voltage and the input ac current, obtains an ac current PF value control and a PWM control signal, and performs voltage boost through the boost circuit.
7. The motor drive with a bus voltage stabilizing function according to any one of claims 2 to 4, wherein the control module controls the boost circuit to boost and stabilize the bus voltage through the active PFC, comprising the steps of:
obtaining an amplitude reference of input alternating current through PI calculation according to a difference value between a set target direct current bus voltage value and an actually sampled bus voltage;
multiplying the input alternating current amplitude reference by the waveform reference of the input alternating current to obtain an instantaneous value reference of the input alternating current; and (3) obtaining an output control PWM signal by calculating a difference value obtained by subtracting the sampled input alternating current value from the instantaneous value reference of the input alternating current through a PI controller.
8. The motor drive apparatus with a bus voltage stabilizing function according to claim 5, wherein the control module includes:
the input sampling unit is used for sampling alternating current input voltage Vg and alternating current input current Ig of the voltage boosting circuit and transmitting sampling information to the voltage feedforward type vector boosting digital control unit;
an output sampling unit for three-phase current i at the output end of the half-bridge inversion module a 、i b And i c Sampling, estimating the position and the speed of the motor through an observer by using sampling information, and transmitting the position and the speed of the motor to a voltage feedforward type digital vector control unit;
the voltage feedforward type digital vector control unit is used for receiving bus direct current input voltage Vg, bus direct current input current I g of the booster circuit and three-phase current i of the output end of the half-bridge inverter module a 、i b And i c And the position and speed data of the motor are subjected to proportional and integral control in a voltage feedforward type digital vector control current loop to obtain feedforward input voltage and feedforward output voltage.
9. The motor drive apparatus with a bus voltage stabilizing function according to claim 8, wherein in the voltage feedforward type digital vector control current loop, the feedforward input voltage and the feedforward output voltage are obtained by proportional and integral control, comprising the steps of:
s1: a speed loop P I control algorithm is carried out through speed data to obtain a PFC inner loop reference current, and meanwhile, a feedforward current is obtained in the PFC inner loop through a PI control algorithm according to a busbar direct current input voltage Vg and a busbar direct current input current Ig;
s2: according to the position data of the motor, a current reference value is obtained through Clark and Park conversion calculation;
s3: according to the feedforward current and the current reference value, in a voltage feedforward type digital vector control current loop, a feedforward input voltage and a feedforward output voltage are obtained through proportional terms and integral in a PI regulator of the voltage feedforward type digital vector control current loop;
s4: the feedforward input voltage and the feedforward output voltage are transmitted to the SVPWM modulator.
10. The motor drive apparatus with a bus voltage stabilizing function according to claim 8, wherein the control module further comprises:
the bus voltage control unit obtains a bus voltage effective value by measuring the voltage VC1 on the capacitor C1 in the voltage boosting circuit and transmits the bus voltage effective value to the PWM modulator; the bus voltage is calculated by the following formula:
wherein V is dc Is the effective value of bus voltage, V c1 For the voltage across the capacitor C1, d 0 Generating a PWM wave with a duty ratio and a frequency f being 2 times of the working frequency of the inverter for the bus voltage control loop;
the PWM modulator is used for generating PWM waves according to the bus voltage effective value calculated by the bus voltage control unit and transmitting the PWM waves to the driving signal synthesis unit;
the SVPWM modulator is used for generating SVPWM waves according to the feedforward input voltage and the feedforward output voltage input by the voltage feedforward type digital vector control unit and transmitting the SVPWM waves to the driving signal synthesis unit;
the driving signal synthesis unit is used for directly inserting the SVPWM waves generated by the SVPWM modulator into the PWM waves generated by the PWM modulator, generating PWM control signals and transmitting the generated PWM control signals to the half-bridge inversion module;
wherein the bus voltage control loop generates a duty cycle d 0 Is less than the zero vector of the feedforward output voltage generated SVPWM wave.
CN202310734914.XA 2023-06-20 2023-06-20 Motor driving device with bus voltage stabilizing function Pending CN117134681A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310734914.XA CN117134681A (en) 2023-06-20 2023-06-20 Motor driving device with bus voltage stabilizing function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310734914.XA CN117134681A (en) 2023-06-20 2023-06-20 Motor driving device with bus voltage stabilizing function

Publications (1)

Publication Number Publication Date
CN117134681A true CN117134681A (en) 2023-11-28

Family

ID=88861795

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310734914.XA Pending CN117134681A (en) 2023-06-20 2023-06-20 Motor driving device with bus voltage stabilizing function

Country Status (1)

Country Link
CN (1) CN117134681A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102594118A (en) * 2012-02-29 2012-07-18 杭州矽力杰半导体技术有限公司 Boost PFC controller
CN107979279A (en) * 2016-10-24 2018-05-01 南京理工大学 A kind of improved wide load step-up type power factor correcting converter
CN209072370U (en) * 2018-10-18 2019-07-05 广西师范大学 A kind of single phase bidirectional AC-DC charge-discharge circuit
CN112886809A (en) * 2021-01-12 2021-06-01 佛山市顺德区和而泰电子科技有限公司 Single closed-loop pulse control circuit
CN112997396A (en) * 2018-08-30 2021-06-18 布鲁萨电子公司 Adapter device for bidirectional operation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102594118A (en) * 2012-02-29 2012-07-18 杭州矽力杰半导体技术有限公司 Boost PFC controller
CN107979279A (en) * 2016-10-24 2018-05-01 南京理工大学 A kind of improved wide load step-up type power factor correcting converter
CN112997396A (en) * 2018-08-30 2021-06-18 布鲁萨电子公司 Adapter device for bidirectional operation
CN209072370U (en) * 2018-10-18 2019-07-05 广西师范大学 A kind of single phase bidirectional AC-DC charge-discharge circuit
CN112886809A (en) * 2021-01-12 2021-06-01 佛山市顺德区和而泰电子科技有限公司 Single closed-loop pulse control circuit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李子楷: "单级升压逆变器及其变频驱动系统", 中国优秀硕士学位论文全文数据库(工程科技Ⅱ辑), no. 2, pages 042 - 316 *

Similar Documents

Publication Publication Date Title
KR0160311B1 (en) High power factor power supply device
CN102801341B (en) There is the AC/DC transducer of PFC and DC/DC transducer
EP1575152B1 (en) Power factor correction circuits
US20020141216A1 (en) Multi-output power conversion circuit
CN102882388A (en) Power supply device and method of controlling power supply device
JPWO2013136755A1 (en) Non-contact charging device power supply device
US20120218798A1 (en) Power conversion device
CN111478572A (en) Single-pole AC-DC converter modal smooth switching and power factor correction control method
CN106787242A (en) A kind of active rectifier for wireless power transmission
US11736025B2 (en) Electrical power conversion apparatus
CN113904570A (en) Three-phase controllable pulse power supply rectifier topology and rectification method
CN105141149B (en) A kind of electron beam microfabrication equipments accelerating power source device and control method
CN106533210A (en) Single-phase buck-boost AC-DC converter and control method thereof
CN117134681A (en) Motor driving device with bus voltage stabilizing function
CN216851764U (en) Energy storage type variable frequency transmission device
CN109660120A (en) Switching circuit, the control method of switching circuit, power supply device and air conditioner
CN216086484U (en) Low-voltage ion wind generator and positive output voltage control circuit thereof
CN115765472A (en) Wide-voltage starting system and starting control method thereof
CN113489293A (en) Method for realizing secondary ripple current suppression of direct-current power supply through control
CN111541371A (en) Direct current electric energy generation circuit for new energy application
CN116805855A (en) Variable frequency motor driving system based on passive network and half-bridge inverter
CN112202346A (en) Enhanced Z-source topological circuit based on improved current correction method
CN112054525A (en) Series active power filter
CN204906219U (en) Accurate power supply unit with higher speed of electron beam machining equipment
CN110611451A (en) Photovoltaic inverter based on gallium nitride device and control method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination