WO2024065783A1 - Servomoteur, son procédé de commande et servo-entraîneur - Google Patents

Servomoteur, son procédé de commande et servo-entraîneur Download PDF

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Publication number
WO2024065783A1
WO2024065783A1 PCT/CN2022/123522 CN2022123522W WO2024065783A1 WO 2024065783 A1 WO2024065783 A1 WO 2024065783A1 CN 2022123522 W CN2022123522 W CN 2022123522W WO 2024065783 A1 WO2024065783 A1 WO 2024065783A1
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WO
WIPO (PCT)
Prior art keywords
bus capacitor
voltage
inverter unit
power
voltage value
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PCT/CN2022/123522
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English (en)
Inventor
Jun Ping Zhang
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Siemens Aktiengesellschaft
Siemens Ltd., China
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Priority to PCT/CN2022/123522 priority Critical patent/WO2024065783A1/fr
Publication of WO2024065783A1 publication Critical patent/WO2024065783A1/fr

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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
    • H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
    • H02P3/18—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor

Definitions

  • the present disclosure relates to the technical field of motor driving, and in particular, relates to a control method for a servo motor.
  • the present disclosure further relates to a servo driver using the control method, and a servo motor including the servo driver.
  • a braking function is configured in the servo driver.
  • costs in software development and hardware for additionally configuring the braking function are high.
  • An object of the present disclosure is to provide a control method for a servo motor, which is conducive to lowering costs in additional configuring a braking function.
  • Another object of the present disclosure is to provide a servo driver, which is conducive to lowering costs in additional configuring a braking function.
  • Another object of the present disclosure is to provide a servo driver, which is conducive to lowering costs in additional configuring a braking function.
  • the servo motor includes a servo driver and a motor.
  • the servo driver includes a rectifier unit, a DC bus, an inverter unit, a bus capacitor, and a pre-charge resistor.
  • the rectifier unit is connected to an AC mains power source and capable of converting an AC power to a DC power.
  • the DC bus is connected to a DC power output terminal of the rectifier unit.
  • the inverter unit being connected to the DC bus and capable of converting a DC power to an AC power.
  • the motor is connected to an AC power output terminal of the inverter unit.
  • the bus capacitor and the pre-charge resistor are connected in series and subsequently connected between positive and negative terminals of the DC bus.
  • the control method includes: in a process of pre-charging the bus capacitor, in a case that a voltage of the bus capacitor is less than a predetermined first voltage value, releasing the short circuit between the two terminals of the pre-charge resistor, and establishing a short circuit between at least two phases of the AC power output terminal of the inverter unit; and in the process of pre-charging the bus capacitor, in a case that the voltage of the bus capacitor is greater than the predetermined first voltage value, short-circuiting the two terminals of the pre-charge resistor, and releasing a short circuit between any two phases of the AC power output terminal of the inverter unit.
  • activation and deactivation of short circuit braking are associated with switching of charge modes of a pre-charge circuit, which is conducive to lowering costs in additional configuring a brake function.
  • the control method further includes: in a process of discharging the bus capacitor upon power off of the AC mains power source, in a case that the voltage of the bus capacitor is greater than a predetermined second voltage value, short-circuiting the two terminals of the pre-charge resistor, and releasing the short circuit between the any two phases of the AC power output terminal of the inverter unit, wherein the predetermined second voltage value is less than the predetermined first voltage value; and in the process of discharging the bus capacitor upon power off of the AC mains power source, in a case that the voltage of the bus capacitor is less than the predetermined second voltage value, releasing the short circuit between the two terminals of the pre-charge resistor, and establishing the short circuit between the at least two phases of the AC power output terminal of the inverter unit. In this way, costs in additionally configuring a braking function are further lowered.
  • control method further includes: in a case that the bus capacitor is fully charged, short-circuiting the two terminals of the pre-charge resistor, and releasing the short circuit between the any two phases of the AC power output terminal of the inverter unit. In this way, costs in additionally configuring a braking function are further lowered.
  • control method further includes: in the process of pre-charging the bus capacitor, in the case that the voltage of the bus capacitor is less than the predetermined first voltage value, controlling the inverter unit to stop outputting power; and in the process of pre-charging the bus capacitor, in the case that the voltage of the bus capacitor is greater than the predetermined first voltage value, controlling the inverter unit to supply power to the motor. In this way, costs in additionally configuring a braking function are further lowered.
  • the control method further includes: in the process of discharging the bus capacitor upon power off of the AC mains power source, in a case that the voltage of the bus capacitor is greater than a predetermined third voltage value, controlling the inverter unit to supply power to the motor, wherein the predetermined third voltage value is less than or equal to the predetermined first voltage value and greater than the predetermined second voltage value; and in the process of discharging the bus capacitor upon power off of the AC mains power source, in a case that the voltage of the bus capacitor is less than the predetermined third voltage value, controlling the inverter unit to switch to a free stop mode or a deceleration stop mode. In this way, safety in stopping cars is enhanced.
  • control method further includes: in a case that the bus capacitor is fully charged, controlling the inverter unit to supply power to the motor.
  • the servo driver configured to drive a motor.
  • the servo driver includes a rectifier unit, a DC bus, an inverter unit, a pre-charge circuit, a switch unit, a voltage detection unit, and a control unit.
  • the rectifier unit is configured to be connected to an AC mains power source and capable of converting an AC power to a DC power.
  • the DC bus is connected to a DC power output terminal of the rectifier unit.
  • the inverter unit is connected to the DC bus and capable of converting an DC power to an AC power.
  • An AC power output terminal of the inverter unit is connected to the motor.
  • the pre-charge circuit includes a bus capacitor and a pre-charge resistor.
  • the bus capacitor and the pre-charge resistor are connected in series and subsequently connected between positive and negative terminals of the DC bus.
  • the switch unit is connected to the pre-charge circuit to be capable of short-circuiting two terminals of the pre-charge resistor.
  • the switch unit is connected to at least two phases of the AC power output terminal of the inverter unit to be capable of establishing a short circuit between the at least two phases of the AC power output terminal of the inverter unit.
  • the voltage detection unit is capable of detecting a voltage of the bus capacitor and generating a voltage signal.
  • the control unit is capable of controlling the switch unit based on the voltage signal, such that: in a process of pre-charging the bus capacitor, in a case that the voltage of the bus capacitor is less than a predetermined first voltage value, the short circuit between the two terminals of the pre-charge resistor is released, and the short circuit is established between the at least two phases of the AC power output terminal of the inverter unit; and in the process of pre-charging the bus capacitor, in the case that the voltage of the bus capacitor is greater than the predetermined first voltage value, the two terminals of the pre-charge resistor are short-circuited, and a short circuit between any two phases of the AC power output terminal of the inverter unit is released.
  • the servo driver by detecting the voltage of the bus capacitor, is capable of synchronously controlling state switching of short circuit braking, and switching of the charge modes of the pre-charge circuit.
  • the servo driver is conducive to lowering costs in additionally configuring a braking function.
  • the control unit is capable of controlling the switch unit based on the voltage signal, such that: in a process of discharging the bus capacitor upon power off of the AC mains power source, in a case that the voltage of the bus capacitor is greater than a predetermined second voltage value, the two terminals of the pre-charge resistor are short-circuited, and the short circuit between the at any two phases of the AC power output terminal of the inverter unit is released, wherein the predetermined second voltage value is less than the predetermined first voltage value; and in the process of discharging the bus capacitor upon power off of the AC mains power source, in a case that the voltage of the bus capacitor is less than the predetermined second voltage value, the short circuit between the two terminals of the pre-charge resistor is released, and the short circuit is established between the at least two phases of the AC power output terminal of the inverter unit. In this way, costs in additionally configuring a braking function are further lowered.
  • the control unit is capable of controlling the switch unit based on the voltage signal, such that: in a case that the bus capacitor is fully charged, the two terminals of the pre-charge resistor are short-circuited, and the short circuit between the any two phases of the AC power output terminal of the inverter unit is released. In this way, costs in additionally configuring a braking function are further lowered.
  • the switch unit includes a pair of contacts and a group of second contacts.
  • the pair of contacts is connected in parallel to the pre-charge resistor and subsequently connected in parallel to the bus capacitor.
  • the group of second contacts is connected to the AC power output terminal of the inverter unit.
  • the switch unit includes a first relay and a second relay.
  • the control unit is connected to a control terminal of the first relay and a control terminal of the second relay.
  • a controlled terminal of the first relay includes the pair of first contacts.
  • a controlled terminal of the second relay includes the group of second contacts.
  • the switch unit includes a third relay.
  • the control unit is connected to a control terminal of the third relay.
  • a controlled terminal of the third relay includes the pair of first contacts and the group of second contacts.
  • the control unit is capable of controlling the inverter unit based on the voltage signal, such that: in the process of pre-charging the bus capacitor, in the case that the voltage of the bus capacitor is less than a predetermined first voltage value, the inverter unit stops outputting power; and in the process of pre-charging the bus capacitor, in the case that the voltage of the bus capacitor is greater than the predetermined first voltage value, the inverter unit supplies power to the motor. In this way, costs in additionally configuring a braking function are further lowered.
  • the control unit is capable of controlling the inverter unit based on the voltage signal, such that: in the process of discharging the bus capacitor upon power off of the AC mains power source, in a case that the voltage of the bus capacitor is greater than a predetermined third voltage value, the inverter unit supplies power to the motor, wherein the predetermined third voltage value is less than or equal to the predetermined first voltage value and greater than the predetermined second voltage value; and in the process of discharging the bus capacitor upon power off of the AC mains power source, in a case that the voltage of the bus capacitor is less than the predetermined third voltage value, the inverter unit switches to a free stop mode or a deceleration stop mode In this way, safety in stopping cars is enhanced.
  • control unit is capable of controlling the inverter unit based on the voltage signal, such that: in a case that the bus capacitor is fully charged, the inverter unit supplies power to the motor.
  • the servo motor includes a motor and a servo motor as described above.
  • the servo driver by detecting the voltage of the bus capacitor, is capable of synchronously controlling state switching of short circuit braking, and switching of the charge modes of the pre-charge circuit.
  • the servo driver is conducive to lowering costs in additionally configuring a braking function.
  • FIG. 1 is a flowchart of a control method for a servo motor according to an exemplary embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of a servo motor according to an exemplary embodiment of the present disclosure
  • FIG. 3 illustrates a time correspondence relationship between a voltage of a bus capacitor and connection and disconnection of a pair of first contacts and connection and disconnection of a pair of second contacts
  • FIG. 4 is a schematic diagram of a servo motor according to an exemplary embodiment of the present disclosure.
  • FIG. 1 is a flowchart of a control method for a servo motor according to an exemplary embodiment of the present disclosure
  • the servo motor includes a servo driver and a motor.
  • the motor is, for example, a permanent-magnet synchronous motor or a separately excited motor.
  • a servo driver 100 of the servo motor for example, includes a rectifier unit 10, a DC bus 20, an inverter unit 30, a pre-charge circuit 40, and a switch unit 50.
  • the rectifier unit 10 is configured to be connected to an AC mains power source and capable of converting an AC power to a DC power.
  • the DC bus 20 is connected to a DC power output terminal of the rectifier unit 10.
  • the inverter unit 30 is connected to the DC bus 20 and capable of converting an DC power to an AC power.
  • An AC power output terminal of the inverter unit 30 is connected to a motor 200.
  • the pre-charge circuit 40 includes a bus capacitor 41 and a pre-charge resistor 42.
  • the bus capacitor 41 and the pre-charge resistor 42 are connected in series and subsequently connected between positive and negative terminals of the DC bus 20.
  • the switch unit 50 includes a pair of first contacts 53 and a pair of second contacts 54.
  • the pair of contacts 53 is connected in parallel to the pre-charge resistor 42 and subsequently connected in parallel to the bus capacitor 41.
  • the group of second contacts 54 is connected to two phases of the AC power output terminal of the inverter unit 30.
  • the pair of first contacts 53 is conducted, and then two terminals of the pre-charge resistor 42 are short-circuited.
  • the pair of second contacts 54 is conducted, and then a short circuit is established between two phases of the AC power output terminal of the inverter unit 30.
  • a specific example of the servo driver is given merely for illustrating the control method according to this exemplary embodiment. However, the control method according to this exemplary embodiment is not limited to implementation based on this specific example.
  • FIG. 3 illustrates a time correspondence relationship between a voltage of a bus capacitor and connection and disconnection of a pair of first contacts and connection and disconnection of a pair of second contacts according to an exemplary embodiment of the present disclosure.
  • an abscissa represents time t
  • Vt represents a variation of the voltage of the bus capacitor with time
  • S 53 represents connection and disconnection of a pair of first contacts 53
  • S 54 represents connection and disconnection of a pair of second contacts 54
  • B represents disconnection
  • C represents connection.
  • the two terminals of the pre-charge resistor 42 are short-circuited (that is, the pair of first contacts 53 is connected) such that the pre-charge circuit is in a high-voltage charge mode, and the short circuit between at least two phases of the AC power output terminal of the inverter unit 30 is released (that is, the pair of second contacts 54 is disconnected) such that short circuit braking of the servo motor is in a deactivated state.
  • the first voltage value V1 needs to be defined according to the needs of pre-charging, which is generally 90%of the voltage of the DC bus, but is not limited to this value.
  • activation and deactivation of short circuit braking are associated with switching of charge modes of the pre-charge circuit, which is conducive to lowering costs in additionally configuring a braking function.
  • the short circuit between the two terminals of the pre-charge resistor 42 is released (that is, the pair of first contacts 53 is disconnected) such that the pre-charge circuit is in the low-voltage charge mode, and the short circuit is established between the at least two phases of the AC power output terminal of the inverter unit 30 (that is, the pair of second contacts 54 is connected) such that short circuit braking of the servo motor is in the activated state.
  • the second voltage value V2 needs to be defined according to the need of braking, which should be less than the first voltage value V1. In this way, in shutdown of the servo motor, activation and deactivation of short circuit braking are associated with switching of charge modes of a pre-charge circuit, which is conducive to further lowering costs in additionally configuring a braking function.
  • step S10 further includes: in the process of pre-charging the bus capacitor 41, in the case that the voltage of the bus capacitor 41 is less than the predetermined first voltage value V1, controlling the inverter unit 30 to stop outputting power; and in the process of pre-charging the bus capacitor 41, in the case that the voltage of the bus capacitor 41 is greater than the predetermined first voltage value V1, controlling the inverter unit 30 to supply power to the motor 200.
  • step S10 further includes: in the process of pre-charging the bus capacitor 41, in the case that the voltage of the bus capacitor 41 is less than the predetermined first voltage value V1, controlling the inverter unit 30 to stop outputting power; and in the process of pre-charging the bus capacitor 41, in the case that the voltage of the bus capacitor 41 is greater than the predetermined first voltage value V1, controlling the inverter unit 30 to supply power to the motor 200.
  • step S30 further includes: in the process of discharging the bus capacitor 41 upon power off of the AC mains power source, in a case that the voltage of the bus capacitor 41 is greater than a predetermined third voltage value V3, controlling the inverter unit 30 to supply power to the motor 200; and in the process of discharging the bus capacitor 41, in a case that the voltage of the bus capacitor 41 is less than the predetermined third voltage value V3, controlling the inverter unit 30 to switch to a free stop mode or a deceleration stop mode.
  • the third voltage value V3 needs to be defined according to the need of braking, which should be less than or equal to the first voltage value V1 and greater than the second voltage value V2.
  • the motor 200 is gradually decelerated under the free stop mode or the deceleration stop mode, and short circuit braking is implemented in the case that the voltage of the bus capacitor 41 is decreased to the second voltage value V2. In this way, safety in stopping cars is enhanced.
  • a difference between the third voltage value V3 and the second voltage value V2 ranges, for example, from 10 V to 20 V.
  • step S20 further includes: in a case that the bus capacitor 41 is fully charged, controlling the inverter unit 30 to supply power to the motor.
  • FIG. 2 illustrates a servo driver according to an embodiment of the present disclosure.
  • a servo driver 100 includes a rectifier unit 10, a DC bus 20, an inverter unit 30, a pre-charge circuit 40, a switch unit 50, a voltage detection unit 60, and a control unit 70.
  • the rectifier unit 10 is configured to be connected to an AC mains power source and capable of converting an AC power to a DC power.
  • the DC bus 20 is connected to a DC power output terminal of the rectifier unit 10.
  • the inverter unit 30 is connected to the DC bus 20 and capable of converting an DC power to an AC power.
  • An AC power output terminal of the inverter unit 30 is configured to be connected to a motor 200.
  • the pre-charge circuit 40 includes a bus capacitor 41 and a pre-charge resistor 42.
  • the bus capacitor 41 and the pre-charge resistor 42 are connected in series and subsequently connected between positive and negative terminals of the DC bus 20.
  • the switch unit 50 is connected to the pre-charge circuit 40 to be capable of short-circuiting two terminals of the pre-charge resistor 42.
  • the switch unit 50 is connected to at least two phases of the AC power output terminal of the inverter unit 30 to be capable of establishing a short circuit between the at least two phases of the AC power output terminal of the inverter unit 30.
  • the switch unit 50 includes a third relay 55.
  • a controlled terminal of the third relay 55 includes a pair of first contacts 53 and a pair of second contacts 54.
  • a pair of contacts 53 is connected in parallel to the pre-charge resistor 42 and subsequently connected in parallel to the bus capacitor 41.
  • a pair of second contacts 54 is connected to two phases of the AC power output terminal of the inverter unit 30.
  • the pair of first contacts 53 is conducted, and then two terminals of the pre-charge resistor 42 are short-circuited.
  • the pair of second contacts 54 is conducted, and then the short circuit is established between two phases of the AC power output terminal of the inverter unit 30.
  • the voltage detection unit 60 is capable of detecting a voltage of the bus capacitor 41 and generating a voltage signal.
  • the control unit 70 is connected to a control terminal of the third relay 55.
  • the control unit 70 is capable of controlling the switch unit 50 based on the voltage signal, such that: in a process of pre-charging the bus capacitor 41, in a case that the voltage of the bus capacitor 41 is less than a predetermined first voltage value V1, the short circuit between the two terminals of the pre-charge resistor 42 is released (that is, the pair of first contacts 53 is disconnected) such that the pre-charge circuit is in a low-voltage charge mode, and the short circuit is established between the at least two phases of the AC power output terminal of the inverter unit 30 (that is, the pair of second contacts 54 is connected) such that short circuit braking of the servo motor is in an activated state; and in the process of pre-charging the bus capacitor 41, in a case that the voltage of the bus capacitor 41 is greater than the predetermined first voltage value V1, the two terminals
  • the servo driver by detecting the voltage of the bus capacitor, is capable of synchronously controlling state switching of short circuit braking, and switching of the charge modes of the pre-charge circuit.
  • the servo driver is conducive to lowering costs in additionally configuring a braking function.
  • the control unit 70 is capable of controlling the switch unit 50 based on the voltage signal, such that: in a process of discharging the bus capacitor 41 upon power off of the AC mains power source, in a case that the voltage of the bus capacitor 41 is greater than a predetermined second voltage value V2, the two terminals of the pre-charge resistor 42 are short-circuited (that is, the pair of first contacts 53 is connected) such that the pre-charge circuit is in the high-voltage charge mode, and the short circuit between the at least two phases of the AC power output terminal of the inverter unit 30 is released (that is, the pair of second contacts 54 is disconnected) such that short circuit braking of the servo motor is in the deactivated state; and in the process of discharging the bus capacitor 41 upon power off of the AC mains power source, in a case that the voltage of the bus capacitor 41 is less than the predetermined second voltage value V2, the short circuit between the two terminals of the pre-charge resistor 42 is released (that is, the pair of first contacts
  • the second voltage value V2 needs to be defined according to the need of braking, which should be less than the first voltage value V1. In this way, in shutdown of the servo motor, activation and deactivation of short circuit braking are associated with switching of charge modes of a pre-charge circuit, which is conducive to further lowering costs in additionally configuring a braking function.
  • control unit 70 is capable of controlling the switch unit 50 based on the voltage signal, such that: in a case that the bus capacitor 41 is fully charged, the two terminals of the pre-charge resistor 42 are short-circuited (that is, the pair of first contacts 53 is connected) , and a short circuit between any two phases of the AC power output terminal of the inverter unit 30 is released (that is, the pair of second contacts 54 is disconnected) , such that short circuit braking of the servo motor is in the deactivated state.
  • deactivation of short circuit braking is associated with a state where the bus capacitor is fully charged, which is conducive to further lowering costs in additionally configuring a braking function.
  • control unit 70 is capable of controlling the inverter unit 30 based on the voltage signal, such that: in the process of pre-charging the bus capacitor 41, in the case that the voltage of the bus capacitor 41 is less than a predetermined first voltage value V1, the inverter unit 30 stops outputting power; and in the process of pre-charging the bus capacitor 41, in the case that the voltage of the bus capacitor 41 is greater than the predetermined first voltage value V1, the inverter unit 30 supplies power to the motor 200.
  • activation and deactivation of short circuit braking are associated with switching of charge modes of a pre-charge circuit, which is conducive to lowering costs in additionally configuring a braking function.
  • the control unit 70 is capable of controlling the inverter unit 30 based on the voltage signal, such that: in the process of discharging the bus capacitor 41 upon power off of the AC mains power source, in a case that the voltage of the bus capacitor 41 is greater than a predetermined third voltage value V3, the inverter unit 30 supplies power to the motor 200; and in the process of discharging the bus capacitor 41 upon power off of the AC mains power source, in a case that the voltage of the bus capacitor 41 is less than the predetermined third voltage value V3, the inverter unit 30 switches to a free stop mode or a deceleration stop mode
  • the third voltage value V3 needs to be defined according to the need of braking, which should be less than or equal to the first voltage value V1 and greater than the second voltage value V2.
  • the motor 200 is gradually decelerated under the free stop mode or the deceleration stop mode, and short circuit braking is implemented in the case that the voltage of the bus capacitor 41 is decreased to the second voltage value V2. In this way, safety in stopping cars is enhanced.
  • a difference between the third voltage value V3 and the second voltage value V2 ranges, for example, from 10 V to 20 V.
  • control unit 70 is capable of controlling the inverter unit 30 based on the voltage signal, such that: in a case that the bus capacitor 41 is fully charged, the inverter unit 30 supplies power to the motor 200.
  • FIG. 4 illustrates a servo driver according to an embodiment of the present disclosure.
  • the common or similar points between the servo driver according to this exemplary embodiment and the servo driver as illustrated in FIG. 2 are not described herein any further, and the differences between these two servo drivers are described hereinafter.
  • the third relay 55 of the switch unit 50 is replaced by a first relay 51 and a second relay 52.
  • the control unit 70 is connected to a control terminal of the first relay 51 and a control terminal of the second relay 52.
  • a controlled terminal of the first relay 51 includes a pair of first contacts 53
  • the controlled terminal of the second relay 52 includes two pairs of second contacts 54.
  • a pair of contacts 53 is connected in parallel to the pre-charge resistor 42 and subsequently connected in parallel to the bus capacitor 41.
  • Two pairs of second contacts 54 are connected to the AC output terminal of the inverter unit 30, and short circuits are established between three phases of the AC output terminal of the inverter unit 30 by connecting the two pairs of second contacts 54 (that is, a pair of second contacts 54 at an upper side in FIG. 4 is connected, and a pair of second contacts 54 at a lower side in FIG. 4 is connected) .
  • the time for connection and disconnection of a pair of first contacts 53 is the same as the time for connection and disconnection of a pair of first contacts 53 described in the servo driver as illustrated in FIG. 2.
  • the time for connection and disconnection of a pair of second contacts 54 is the same as the time for connection and disconnection of a pair of second contacts 54 described in the servo driver as illustrated in FIG. 2.
  • the servo driver by detecting the voltage of the bus capacitor, is capable of synchronously controlling state switching of short circuit braking, and switching of the charge modes of the pre-charge circuit.
  • the servo driver is conducive to lowering costs in additionally configuring a braking function.
  • the servo motor includes a motor 200 and a servo driver 100 as illustrated in FIG. 2 or 4.
  • the motor 200 is, for example, a permanent-magnet synchronous motor or a separately excited motor.
  • the servo motor is conducive to lowering costs in additionally configuring a braking function.
  • the inverter unit in the deceleration stop mode, progressively decreases an output frequency in accordance with a predetermined deceleration time, and decreases the frequency to 0 Hz such that the motor stops.
  • the inverter stops outputting power, and the motor stops freely in accordance to a mechanical inertial force.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Stopping Of Electric Motors (AREA)
  • Inverter Devices (AREA)

Abstract

Procédé de commande pour un servomoteur comprenant : dans un processus de précharge du condensateur de bus, dans un cas où une tension du condensateur de bus est inférieure à une première valeur de tension prédéfinie, la libération du court-circuit entre les deux bornes de la résistance de précharge, et l'établissement d'un court-circuit entre au moins deux phases de la borne de sortie de puissance CA de l'unité onduleur ; et dans le processus de précharge du condensateur de bus, dans un cas où la tension du condensateur de bus est supérieure à la première valeur de tension prédéfinie, le court-circuit des deux bornes de la résistance de précharge, et la libération d'un court-circuit entre deux phases quelconques de la borne de sortie de puissance CA de l'unité onduleur. Le procédé de commande est propice à la réduction de coûts dans la configuration supplémentaire d'une fonction de freinage. L'invention divulgue également un servo-entraîneur et un servomoteur.
PCT/CN2022/123522 2022-09-30 2022-09-30 Servomoteur, son procédé de commande et servo-entraîneur WO2024065783A1 (fr)

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PCT/CN2022/123522 WO2024065783A1 (fr) 2022-09-30 2022-09-30 Servomoteur, son procédé de commande et servo-entraîneur

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PCT/CN2022/123522 WO2024065783A1 (fr) 2022-09-30 2022-09-30 Servomoteur, son procédé de commande et servo-entraîneur

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