CN112737417A - Alternating current servo driver soft start circuit and working method thereof - Google Patents
Alternating current servo driver soft start circuit and working method thereof Download PDFInfo
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- 238000000034 method Methods 0.000 title abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 43
- 239000003990 capacitor Substances 0.000 claims abstract description 40
- 238000002955 isolation Methods 0.000 claims abstract description 31
- 238000005070 sampling Methods 0.000 claims description 49
- 238000001914 filtration Methods 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 3
- 238000004146 energy storage Methods 0.000 claims 1
- 238000011017 operating method Methods 0.000 claims 1
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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
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/02—Details of starting control
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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
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/02—Details of starting control
- H02P1/04—Means for controlling progress of starting sequence in dependence upon time or upon current, speed, or other motor parameter
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Abstract
The invention discloses an alternating current servo driver soft start circuit and a working method thereof. The system comprises a user input voltage detection circuit, an isolation diode circuit, a soft start unit, a bus capacitor filter circuit and a bus voltage detection circuit. The method comprises the following steps: firstly, setting a soft start ending voltage, a soft start resetting voltage and a driver undervoltage alarm voltage; then the driver monitors the bus voltage in real time, compares the bus voltage with the soft start threshold voltage and judges whether the soft start is finished; the driver monitors the input voltage in real time, compares the input voltage with the soft start reset voltage and judges whether the user cuts off the input power supply or not; then comparing the bus voltage detection with the soft start reset voltage, and judging whether the soft start circuit needs to be reset; and finally, comparing the voltage of the input end with the soft start reset voltage, and judging whether the user is electrified again. The invention avoids the impact of the power supply of the user from the power-on current, and improves the adaptability and the reliability of the driver.
Description
Technical Field
The invention relates to the technical field of alternating current servo drivers, in particular to a soft start circuit of an alternating current servo driver and a working method thereof.
Background
The ac servo driver is widely used in various automatic control systems, such as machine tools, robots and other civil fields, and has a wide application in the military field, such as artillery follow-up systems, fire control systems, radars, irradiators and the like. In the using process, a user supplies power to the driver through the power supply system, and because the capacitance of a bus capacitor in the driver is large, the charging current of the capacitor is uncontrollable in the power-on process, the impact current is large, and the power supply system of the user is greatly influenced or even damaged, the power-on of the driver needs a soft start circuit.
A conventional ac servo driver soft start circuit (patent CN111313676A) is shown in fig. 1, the input of the circuit is a dc power supply unit 1 or a rectifier unit 2, the specific circuit mode is determined by a user power supply mode, the circuit is the dc power supply unit 1 when a dc power supply is used for supplying power, and the circuit is the rectifier unit 2 when an ac power supply is used, and the circuit further includes a soft start unit 3, a bus voltage sampling circuit 4, a microcontroller 5, a voltage dividing resistor 6, a sampling resistor 7, a bus capacitor 8, a relay 9, and a current limiting resistor 10. When the driver is powered on, the relay 9 is in an initial state of disconnection, the direct current supply unit 1 or the rectifying unit 2 charges the bus capacitor 8 through the current-limiting resistor 10, the bus voltage sampling circuit 4 samples the value of the bus voltage in real time and sends the value to the microcontroller 5 to be read, and after the bus voltage rises to a set threshold value and delays for a period of time, the relay 9 is controlled to be attracted, the current-limiting resistor 10 is short-circuited, and the power-on is finished. The soft start circuit has the disadvantages that when a user normally uses the soft start circuit, the power is supplied to the power supply without current impact, but when the user is powered off, the bus voltage of the driver slowly drops, when the driver is not under-voltage alarm threshold, the relay 9 is always kept in an attraction state because the driver is not in an alarm state, the user is powered on again, the direct current power supply unit 1 or the rectifier unit 2 directly charges the bus capacitor 8 through the relay 9, so that great current impact is caused, a user power supply system is greatly influenced, and alarm shutdown or even damage occurs.
Disclosure of Invention
The invention aims to provide a soft start circuit of an alternating current servo driver and a working method thereof, which can play a role of soft start when a user carries out abnormal power-on operation, protect a power supply system of the user from being influenced by power-on current impact and improve the reliability of the system.
The technical solution for realizing the purpose of the invention is as follows: a soft start circuit of an alternating current servo driver comprises an input voltage detection circuit, an isolation diode circuit, a soft start unit, a bus capacitor filter circuit and a bus voltage detection circuit;
the input voltage detection circuit comprises a first divider resistor, a first sampling resistor and an input voltage sampling circuit, and the input voltage detection circuit is connected with a user power supply system and an isolation diode circuit, is used for detecting the voltage value of an input power supply and outputs the voltage value to the microcontroller circuit;
the isolation diode circuit comprises an isolation diode which is connected with the input voltage detection circuit and the soft start unit and is used for isolating in the circuit and preventing energy feedback;
the soft start unit comprises a soft start relay and a current-limiting resistance circuit, is connected with the isolation diode circuit and the bus capacitor filter circuit, and is used for executing the action of soft start;
the bus capacitor filter circuit comprises a driver bus filter capacitor, is connected with the soft start unit and the bus voltage detection circuit and is used for filtering and storing energy for a driver bus;
the bus voltage detection circuit comprises a second divider resistor, a second sampling resistor and a bus voltage sampling circuit, and the bus voltage detection circuit is connected with the bus capacitor filter circuit and is used for detecting the bus voltage of the driver and outputting the bus voltage to the microcontroller circuit.
Further, an input power supply of the alternating current servo driver adopts a direct current power supply mode or an alternating current power supply mode, which is determined by a user power supply mode, wherein a direct current power supply unit is adopted when the user power supply mode adopts the direct current power supply, and a rectification unit is adopted when the user power supply mode adopts the alternating current power supply mode.
Furthermore, the first voltage dividing resistor and the first sampling resistor are connected with an input power supply, the voltage of the input power supply is sampled in a resistor voltage dividing mode and then is sent to the micro-control circuit through the input voltage sampling circuit, the sampling result is compared with the soft start unit reset voltage U2 and serves as a judgment basis for resetting the soft start unit, and the micro-control circuit controls the soft start relay to act according to the judgment result.
Furthermore, the isolation diode is connected in series between the input power supply and the soft start unit, the anode of the isolation diode is connected with the input power supply, so that the input power supply is isolated from the driver bus in a single direction, when the user power supply is cut off, the value of the input voltage sampling circuit is zero, and the value of the bus voltage sampling circuit is still kept as the driver bus voltage and is continuously reduced.
Furthermore, when the driver is powered on, the initial state of the soft start relay is disconnected, the driver input power supply charges the bus filter capacitor of the driver through the current-limiting resistance circuit, after the soft start is finished, the soft start relay is closed after time delay, the current-limiting resistance circuit is short-circuited, and the soft start is finished.
Furthermore, the driver bus filter capacitor is formed by combining one or more electrolytic capacitors in a series-parallel mode, is connected to the driver bus in parallel, and stores energy and filters the driver bus.
Furthermore, the second voltage division resistor and the second sampling resistor are connected with the driver bus, the voltage of the driver bus is sampled in a resistor voltage division mode and then is sent to the micro control circuit through the bus voltage sampling circuit, the sampling result is compared with the soft start threshold voltage U1 to serve as a judgment basis for judging whether the soft start is finished, and the micro control circuit controls the soft start relay to act according to the judgment result.
A working method of a soft start circuit of an alternating current servo driver comprises the following steps:
step 1, setting a soft start ending voltage U1, a soft start resetting voltage U2 and a driver undervoltage alarm voltage U3;
step 4, comparing the bus voltage detection Udc with a soft start reset voltage U1, and disconnecting a soft start relay when the bus voltage value is greater than U3; if the bus voltage value is smaller than U3, performing undervoltage alarm and shutdown operation on the driver;
Compared with the prior art, the invention has the remarkable advantages that: (1) the driver can judge whether the power supply is cut off by the user or not due to the detection of the state of the power supply input by the user, so that the action of starting a circuit relay is controlled, and the power-on operation of the user can be adapted; (2) the impact of the power supply of the user by the power-on current is avoided, and the adaptability of the driver and the reliability of a user system are improved.
Drawings
Fig. 1 is a schematic structural diagram of a conventional ac servo driver soft start circuit.
FIG. 2 is a schematic diagram of a soft start circuit of an AC servo driver according to the present invention.
FIG. 3 is a flowchart illustrating a control method of a soft start circuit of an AC servo driver according to the present invention.
Detailed Description
The invention relates to a soft start circuit of an alternating current servo driver, which comprises an input voltage detection circuit, an isolation diode circuit, a soft start unit 3, a bus capacitor filter circuit and a bus voltage detection circuit;
the input voltage detection circuit comprises a first voltage dividing resistor 13, a first sampling resistor 14 and an input voltage sampling circuit 12, and the input voltage detection circuit is connected with a user power supply system and an isolation diode circuit, is used for detecting the voltage value of an input power supply and outputs the voltage value to the microcontroller circuit 5;
the isolation diode circuit comprises an isolation diode 11 which is connected with the input voltage detection circuit and the soft start unit 3 and is used for isolating in the circuit and preventing energy feedback;
the soft start unit 3 comprises a soft start relay 9 and a current limiting resistance circuit 10, is connected with an isolation diode circuit and a bus capacitor filter circuit, and is used for executing the action of soft start;
the bus capacitor filter circuit comprises a driver bus filter capacitor 8 which is connected with the soft start unit 3 and the bus voltage detection circuit and is used for filtering and storing energy for a driver bus;
the bus voltage detection circuit comprises a second voltage dividing resistor 6, a second sampling resistor 7 and a bus voltage sampling circuit 4, and the bus voltage detection circuit is connected with the bus capacitor filter circuit and used for detecting the bus voltage of the driver and outputting the bus voltage to the microcontroller circuit 5.
Further, the input power supply of the alternating current servo driver adopts a direct current power supply mode or an alternating current power supply mode, which is determined by a user power supply mode, wherein the user power supply mode adopts a direct current power supply unit 1 when adopting the direct current power supply mode, and adopts a rectification unit 2 when adopting the alternating current power supply mode.
Furthermore, the first voltage dividing resistor 13 and the first sampling resistor 14 are connected to the input power supply, the input power supply voltage is sampled in a manner of resistor voltage division, and then the sampled voltage is sent to the micro control circuit 5 through the input voltage sampling circuit 12, the sampling result is compared with the reset voltage U2 of the soft start unit 3 and is used as a judgment basis for resetting the soft start unit 3, and the micro control circuit 5 controls the soft start relay 9 to operate according to the judgment result.
Further, the isolation diode 11 is connected in series between the input power supply and the soft start unit 3, the anode of the isolation diode 11 is connected with the input power supply, so that the input power supply is isolated from the driver bus in a single direction, when the user power supply is cut off, the value of the input voltage sampling circuit 12 is zero, and the value of the bus voltage sampling circuit 4 is still kept as the driver bus voltage and continuously decreases.
Further, when the driver is powered on, the soft start relay 9 is in an off state initially, the driver input power supply charges the driver bus filter capacitor 8 through the current limiting resistor circuit 10, after the soft start is completed, the soft start relay 9 is closed after time delay, the current limiting resistor circuit 10 is short-circuited, and the soft start is completed.
Further, the driver bus filter capacitor 8 is formed by combining one or more electrolytic capacitors in a series-parallel connection mode, and is connected to the driver bus in parallel to store energy and filter the driver bus.
Further, the second voltage dividing resistor 6 and the second sampling resistor 7 are connected with the driver bus, the voltage of the driver bus is sampled in a resistor voltage dividing mode, then the sampled voltage is sent to the micro control circuit 5 through the bus voltage sampling circuit 4, the sampling result is compared with the soft start threshold voltage U1 to serve as a judgment basis for judging whether the soft start is finished, and the micro control circuit 5 controls the soft start relay 9 to act according to the judgment result.
The invention discloses a working method of a soft start circuit of an alternating current servo driver, which comprises the following steps:
step 1, setting a soft start ending voltage U1, a soft start resetting voltage U2 and a driver undervoltage alarm voltage U3;
step 4, comparing the bus voltage detection Udc with the soft start reset voltage U1, and disconnecting the soft start relay 9 when the bus voltage value is greater than U3; if the bus voltage value is smaller than U3, performing undervoltage alarm and shutdown operation on the driver;
The invention is described in further detail below with reference to the figures and specific examples.
Examples
With reference to fig. 2, the ac servo driver soft start circuit of this embodiment includes a user input voltage detection circuit, an isolation diode circuit, a soft start unit 3, a bus capacitor filter circuit, and a bus voltage detection circuit;
the input voltage detection circuit comprises a first voltage dividing resistor 13, a first sampling resistor 14, an input voltage sampling circuit 12 and a microcontroller circuit 5, is connected with a user power supply system and an isolation diode circuit, and is used for detecting the voltage value of a user input power supply;
the isolation diode circuit comprises an isolation diode 11 which is connected with the input voltage detection circuit and the soft start unit 3 and is used for isolating in the circuit and preventing energy feedback;
the soft start unit 3 comprises a soft start relay 9 and a current limiting resistance circuit 10, is connected with an isolation diode circuit and a bus capacitor filter circuit, and is used for executing the action of soft start;
the bus capacitor filter circuit comprises a driver bus filter capacitor 8 which is connected with the soft start unit 3 and the bus voltage detection circuit and is used for filtering and storing energy for a driver bus;
the bus voltage detection circuit comprises a second divider resistor 6, a second sampling resistor 7, a bus voltage sampling circuit 4 and a microcontroller circuit 5, is connected with the bus capacitor filter circuit and is used for detecting the bus voltage of the driver.
Further, the input power supply of the alternating current servo driver adopts a direct current power supply mode or an alternating current power supply mode, which is determined by a user power supply mode, wherein the user power supply mode adopts a direct current power supply unit 1 when adopting the direct current power supply mode, and adopts a rectification unit 2 when adopting the alternating current power supply mode.
Furthermore, the first voltage dividing resistor 13 and the first sampling resistor 14 are connected to the input power supply, the input power supply voltage is sampled in a manner of resistor voltage division, and then the sampled voltage is sent to the micro control circuit 5 through the input voltage sampling circuit 12, the sampling result is compared with the reset voltage U2 of the soft start unit 3 and is used as a judgment basis for resetting the soft start unit 3, and the micro control circuit 5 controls the soft start relay 9 to operate according to the judgment result.
Furthermore, the isolation diode 11 is connected in series between the input power supply and the soft start unit 3, the anode of the isolation diode is connected with the input power supply, so that the input power supply is isolated from the driver bus in a single direction, when the user power supply is cut off, the value of the input voltage sample 12 is zero, and the value of the bus voltage sample 4 is still kept as the driver bus voltage and slowly decreases. The isolation diode also plays a role in preventing energy feedback, when the power supply is the direct current power supply unit 1, the load is generally not allowed to perform energy feedback, when the driving system brakes, the bus voltage of the driver can rise, the higher feedback voltage can cause the fault protection or damage of the power supply, and the isolation diode 11 in the system can prevent the problems.
Further, when the driver is powered on, the soft start relay 9 is in an off state initially, the driver input power supply charges the driver bus filter capacitor 8 through the current limiting resistor circuit 10, after the soft start is completed, the soft start relay 9 is closed after time delay, the current limiting resistor circuit 10 is short-circuited, and the soft start is completed.
Further, the driver bus filter capacitor 8 is formed by combining one or more electrolytic capacitors in a series-parallel connection mode, and is connected to the driver bus in parallel to store energy and filter the driver bus.
Further, the second voltage dividing resistor 6 and the second sampling resistor 7 are connected with the driver bus, the voltage of the driver bus is sampled in a resistor voltage dividing mode, then the sampled voltage is sent to the micro control circuit 5 through the bus voltage sampling circuit 4, the sampling result is compared with the soft start threshold voltage U1 to serve as a judgment basis for judging whether the soft start is finished, and the micro control circuit 5 controls the soft start relay 9 to act according to the judgment result.
With reference to fig. 3, a method for controlling a soft start circuit of an ac servo driver in this embodiment includes the following steps:
step 1, setting a soft start threshold voltage U1, a soft start reset voltage U2 and a driver undervoltage alarm voltage U3, specifically as follows:
setting the value of the soft start threshold voltage U1 to be about 80% of the power supply voltage of a user for judging whether the soft start is finished or not; the soft start reset voltage U2 is used for judging the power-off and power-on of a user, the input voltage has large change amplitude and short time, and is easy to judge, and the soft start reset voltage U1 is generally set slightly smaller than the soft start ending voltage in consideration of the power supply fluctuation of the user; the value of the undervoltage alarm voltage U3 of the driver depends primarily on whether the driver is operating properly below this bus voltage.
the driver monitors the value of the bus voltage Udc in real time, the detected value of the bus voltage Udc is compared with a soft start threshold voltage U1, when the bus voltage is higher than U1 for the first time, the driver is considered to be powered on for soft start to be completed, after the delay time t1 set by software, the soft start relay 9 is controlled to be attracted, the soft start is completed, the time length of t1 needs to be set in consideration of a user power supply mode, the capacity of the bus filter capacitor 8 of the driver and the resistance value of the current limiting resistor circuit 10, the fact that the bus filter capacitor 8 of the driver is charged after the delay time is over is ensured, and overlarge impact current cannot be generated when the soft circuit relay 9 is closed.
the driver monitors the input voltage Udc2 in real time, compares the voltage value Udc2 obtained by detecting the voltage value of the input terminal with the soft start band reset voltage U2, and judges that the user cuts off the power supply and the software enters the interruption of the soft start unit 3 reset when the voltage value of the input power supply is less than U2.
Step 4, comparing the bus voltage detection Udc with the soft start reset voltage U1, and judging whether the soft start circuit needs to be reset, specifically as follows:
after the software enters the interruption of the soft start circuit reset, the bus voltage detection value Udc is compared with the undervoltage alarm voltage U3 of the driver, and when the bus voltage value is greater than U3, the soft start relay 9 is switched off; and if the bus voltage value is less than U3, performing an under-voltage alarm and shutdown operation of the driver.
after the soft start relay 9 is disconnected, comparing a voltage value Udc2 obtained by detecting the voltage of the input end with a soft start belt circuit reset voltage U2, and judging that the user is electrified again when the voltage value of the input power supply is greater than U2; and the condition that the voltage value of the input power supply is larger than U2 does not occur, namely when the user is not electrified again and the bus voltage Udc is smaller than the undervoltage alarm threshold U3, the driver performs undervoltage alarm and shutdown operation.
In this embodiment, the user supply voltage is DC540V, the soft-start ending voltage is set to 430V, the soft-start reset voltage is set to 400V, and the driver under-voltage alarm voltage is set to 350V. After the driver is powered on, when the bus voltage value Udc detected by the bus voltage is larger than 430V, the soft start is judged to be finished, after the delay of 1s, the soft start relay 9 is closed, the soft start power-on is finished, and the driver still monitors the input voltage and the bus voltage in real time. When the input voltage is less than 400V, the user is considered to cut off the power supply, and the action of the driver is judged according to the value of the bus voltage. When the bus voltage is greater than 350V, the microcontroller circuit 5 controls the soft start relay 9 to be switched off, if the input power supply is greater than 400V, the user is considered to be powered up again, the microcontroller circuit 5 controls the soft start relay 9 to be switched on after 1s of delay, the current limiting resistance circuit 10 is short-circuited, if the user is not powered up again, discharging is carried out after a period of time, and when the bus voltage is less than or equal to 350V, the driver carries out under-voltage alarm and shutdown operation.
In summary, according to the invention, since the state of the power input by the user is detected, the driver can judge whether the power is cut off by the user, and further control the action of the starting circuit relay, so that the method can adapt to any power-on operation of the user, avoid the impact of power-on current on the power supply of the user, and improve the adaptability of the driver and the reliability of a user system.
Claims (8)
1. An alternating current servo driver soft start circuit is characterized by comprising an input voltage detection circuit, an isolation diode circuit, a soft start unit (3), a bus capacitor filter circuit and a bus voltage detection circuit;
the input voltage detection circuit comprises a first voltage dividing resistor (13), a first sampling resistor (14) and an input voltage sampling circuit (12), and the input voltage sampling circuit is connected with a user power supply system and an isolation diode circuit, is used for detecting the voltage value of an input power supply and outputs the voltage value to the microcontroller circuit (5);
the isolation diode circuit comprises an isolation diode (11) which is connected with the input voltage detection circuit and the soft start unit (3) and is used for isolating in the circuit and preventing energy feedback;
the soft start unit (3) comprises a soft start relay (9) and a current limiting resistance circuit (10), is connected with the isolation diode circuit and the bus capacitor filter circuit, and is used for executing the action of soft start;
the bus capacitor filter circuit comprises a driver bus filter capacitor (8) which is connected with the soft start unit (3) and the bus voltage detection circuit and is used for filtering and storing energy for a driver bus;
the bus voltage detection circuit comprises a second voltage dividing resistor (6), a second sampling resistor (7) and a bus voltage sampling circuit (4), and the bus voltage detection circuit is connected with the bus capacitor filter circuit and used for detecting the bus voltage of the driver and outputting the bus voltage to the microcontroller circuit (5).
2. An AC servo driver soft start circuit according to claim 1, characterized in that, the input power supply of the AC servo driver adopts a DC power supply mode or an AC power supply mode, which is determined by the user power supply mode, the DC power supply unit (1) is adopted when the user power supply mode adopts the DC power supply, and the rectifier unit (2) is adopted when the user power supply mode adopts the AC power supply mode.
3. An AC servo driver soft start circuit according to claim 1, wherein the first voltage dividing resistor (13) and the first sampling resistor (14) are connected with an input power supply, the input power supply voltage is sampled by means of resistor voltage division, and then the sampled result is sent to the micro control circuit (5) through the input voltage sampling circuit (12), the sampled result is compared with the reset voltage U2 of the soft start unit (3) to be used as a judgment basis for resetting the soft start unit (3), and the micro control circuit (5) controls the soft start relay (9) to act according to the judged result.
4. An ac servo driver soft start circuit as claimed in claim 1, wherein the isolation diode (11) is connected in series between the input power supply and the soft start unit (3), the anode of the isolation diode (11) is connected to the input power supply to make the input power supply isolated from the driver bus in one way, when the user power supply is cut off, the value of the input voltage sampling circuit (12) is zero, and the value of the bus voltage sampling circuit (4) is still maintained as the driver bus voltage and continuously decreases.
5. An AC servo driver soft start circuit according to claim 1, characterized in that when the driver is powered on, the soft start relay (9) is in an off state, the driver input power supplies charges the driver bus filter capacitor (8) through the current limiting resistor circuit (10), after the soft start is completed, the soft start relay (9) is closed after time delay, and the current limiting resistor circuit (10) is short-circuited, so that the soft start is completed.
6. An AC servo driver soft start circuit according to claim 1, characterized in that the driver bus filter capacitor (8) is composed of one or more electrolytic capacitors in series-parallel combination, connected in parallel to the driver bus for energy storage and filtering.
7. An AC servo driver soft start circuit according to claim 1, wherein the second voltage dividing resistor (6) and the second sampling resistor (7) are connected with a driver bus, the driver bus voltage is sampled by means of resistor voltage division and then sent to the micro control circuit (5) through the bus voltage sampling circuit (4), the sampling result is compared with a soft start threshold voltage U1 to be used as a basis for judging whether the soft start is finished, and the micro control circuit (5) controls the action of the soft start relay (9) according to the judging result.
8. An operating method of a soft start circuit of an alternating current servo driver is characterized by comprising the following steps:
step 1, setting a soft start ending voltage U1, a soft start resetting voltage U2 and a driver undervoltage alarm voltage U3;
step 2, the driver monitors the value of the bus voltage Udc in real time, compares the bus voltage detection value Udc with a soft start threshold voltage U1, controls a soft start relay (9) to pull in when the bus voltage is higher than U1 for the first time and then passes through the delay time set by software, and the soft start is finished;
step 3, the driver monitors the input voltage Udc2 in real time, compares the detected value Udc2 of the input voltage with the soft start reset voltage U2, and judges that the power supply is cut off by the user and the software enters the interruption of the reset of the soft start unit (3) when the voltage value of the input power supply is less than U2;
step 4, comparing the bus voltage detection Udc with a soft start reset voltage U1, and disconnecting a soft start relay (9) when the bus voltage value is greater than U3; if the bus voltage value is smaller than U3, performing undervoltage alarm and shutdown operation on the driver;
step 5, comparing the detected value Udc2 of the input end voltage with the soft start reset voltage U2, and when the voltage value of the input power supply is greater than U2, judging that the user is electrified again; and if the voltage value of the input power supply is not greater than U2, judging that the user is not electrified again, and performing undervoltage alarm and shutdown operation on the driver when the bus voltage Udc is less than the undervoltage alarm threshold U3.
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| CN202011532103.4A CN112737417B (en) | 2020-12-23 | 2020-12-23 | Alternating current servo driver soft start circuit and working method thereof |
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| CN202011532103.4A CN112737417B (en) | 2020-12-23 | 2020-12-23 | Alternating current servo driver soft start circuit and working method thereof |
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| CN112737417B CN112737417B (en) | 2022-05-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202353453U (en) * | 2011-11-18 | 2012-07-25 | 广州三晶电气有限公司 | Loss-free transducer soft-start device |
| CN109600059A (en) * | 2018-12-18 | 2019-04-09 | 航天柏克(广东)科技有限公司 | A kind of soft starting circuit of DC bus-bar voltage |
| CN110138231A (en) * | 2019-05-10 | 2019-08-16 | 珠海格力电器股份有限公司 | Drive control circuit, control method thereof, drive control system and air conditioner |
| CN111313676A (en) * | 2020-03-18 | 2020-06-19 | 许昌许继风电科技有限公司 | Servo driver soft start system and control method thereof |
-
2020
- 2020-12-23 CN CN202011532103.4A patent/CN112737417B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202353453U (en) * | 2011-11-18 | 2012-07-25 | 广州三晶电气有限公司 | Loss-free transducer soft-start device |
| CN109600059A (en) * | 2018-12-18 | 2019-04-09 | 航天柏克(广东)科技有限公司 | A kind of soft starting circuit of DC bus-bar voltage |
| CN110138231A (en) * | 2019-05-10 | 2019-08-16 | 珠海格力电器股份有限公司 | Drive control circuit, control method thereof, drive control system and air conditioner |
| CN111313676A (en) * | 2020-03-18 | 2020-06-19 | 许昌许继风电科技有限公司 | Servo driver soft start system and control method thereof |
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Inventor after: Li Qiang Inventor after: Ding Dongsheng Inventor after: Dong Dingfeng Inventor after: Dong Haixing Inventor after: Xu Jian Inventor after: Liu Xiaodong Inventor after: He Sukun Inventor after: Li Jiajian Inventor before: Li Qiang Inventor before: Ding Dongsheng Inventor before: Dong Haixing Inventor before: Xu Jian Inventor before: Liu Xiaodong Inventor before: He Sukun Inventor before: Li Jiajian |
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