CN-224218279-U - Monostable magnetic control driver

CN224218279UCN 224218279 UCN224218279 UCN 224218279UCN-224218279-U

Abstract

The utility model provides a monostable magnetic control driver which comprises a high-voltage driving unit, a reverse voltage control unit, a high-voltage control unit, an independent power supply unit and a CPLD control end, wherein the CPLD control end is electrically connected with the high-voltage control unit, the CPLD control end sends an opening/closing signal to the high-voltage control unit, the high-voltage driving unit is respectively electrically connected with the high-voltage control unit and a circuit breaker, the high-voltage driving unit is used for opening/closing the circuit breaker according to the opening/closing signal, the reverse voltage control unit is respectively electrically connected with the CPLD control end and the circuit breaker, the reverse voltage control unit absorbs reverse voltage generated by closing the circuit breaker during closing, and the independent power supply unit is used for providing isolation voltage. The high-voltage control switch avoids the influence of high-voltage side interference on the CPLD control end and the risk of 'plate explosion', and the photoelectric signal conversion is adopted, so that the optical signal transmission is not influenced by electromagnetic noise, and the CPLD control end is suitable for a high-voltage magneto-inductive environment.

Inventors

ZHANG JIANQUAN
LI YIGANG
WU YUETING

Assignees

上海固缘电力科技有限公司

Dates

Publication Date: 20260508
Application Date: 20250529

Claims (5)

1. The monostable magnetic control driver is characterized by comprising a high-voltage driving unit (101), a reverse voltage control unit (102), a high-voltage control unit (103), an independent power supply unit (104) and a CPLD control end (105); the CPLD control end (105) is electrically connected with the high-voltage control unit (103), and the CPLD control end (105) sends an opening/closing signal to the high-voltage control unit (103); The high-voltage driving unit (101) is respectively and electrically connected with the high-voltage control unit (103) and the circuit breaker, and the high-voltage driving unit (101) performs switching on/off on the circuit breaker according to a switching on/off signal; The reverse voltage control unit (102) is respectively and electrically connected with the CPLD control end (105) and the circuit breaker, and the reverse voltage control unit (102) absorbs reverse voltage generated by switching on the circuit breaker during switching on; The independent power supply unit (104) is respectively and electrically connected with the high-voltage driving unit (101), the reverse voltage control unit (102) and the high-voltage control unit (103) and is used for providing isolation voltage.
2. The monostable magnetic control driver according to claim 1, wherein the high voltage driving unit (101) comprises a first IGBT element, a gate of the first IGBT element is used for receiving a control input signal of the high voltage control unit (103), a channel region is turned on when a gate voltage is positive, the channel region is turned off when the gate voltage is negative, and a source and a drain of the first IGBT element are connected to an on/off control terminal of a circuit breaker.
3. Monostable magnetically controlled driver according to claim 1, characterized in that the reverse voltage control unit (102) comprises a first logical output optocoupler and a second IGBT; The primary side of the first logic output optocoupler is connected with a CPLD control end (105) and is used for generating current at the front end of the optocoupler according to a closing state judgment result of the CPLD control end (105) so as to enable a phototriode at the secondary side to be conducted, the secondary side of the first logic output optocoupler is connected with a grid electrode of a second IGBT and is used for generating forward voltage to control a channel region of the second IGBT to be conducted, and a source electrode and a drain electrode of the second IGBT are connected with a circuit breaker to absorb reverse voltage generated by closing of the circuit breaker.
4. Monostable magnetically controlled driver according to claim 2, characterized in that the high voltage control unit (103) comprises a second logic output optocoupler; The primary side of the second logic output optocoupler is electrically connected with the CPLD control end (105) and is used for inputting signals, so that an optocoupler input current is generated by a light-emitting diode on the primary side, the light-emitting diode is driven, a phototriode on the secondary side is conducted, current is generated in a loop, an output voltage is generated through a load resistor, the secondary side of the second logic output optocoupler is connected with the grid electrode of the first IGBT element, and the switching-on and switching-off signals of the breaker are output to the high-voltage driving unit (101) through a front-end voltage signal.
5. Monostable magnetic control driver according to claim 1, characterized in that the independent power supply unit (104) comprises an isolation power supply module, which voltage isolates the high voltage drive unit (101), the reverse voltage control unit (102), the high voltage control unit (103).

Description

Monostable magnetic control driver Technical Field The utility model relates to the field of circuit breaker control circuits, in particular to a monostable magnetic control driver. Background The circuit breaker is classified into a high voltage circuit breaker and a low voltage circuit breaker according to its range of use. The low-voltage circuit breaker is also called automatic switch, which is an electric appliance with manual switching function and automatic voltage loss, undervoltage, overload and short-circuit protection. It can be used to distribute electric energy, not frequently start asynchronous motor, protect power supply circuit and motor, when they are in serious overload or short circuit and under-voltage, it can automatically cut off circuit, its function is equivalent to the combination of fuse switch and over-under-heating relay, etc. and after breaking fault current it generally does not need to change parts, so that it has been widely used. The monostable magnetic control driver can easily realize the switching-on and switching-off of the low-voltage control high-voltage circuit breaker due to the simple control signal end, however, the safety and stability of the existing monostable magnetic control driver still need to be improved, and the monostable magnetic control driver is particularly characterized in that electromagnetic noise can interfere a driver circuit because the monostable magnetic control driver works in a high-pressure magnetic environment, so that the circuit fault is caused by the fact that the driver circuit is subjected to error switching-off or error switching-on. Therefore, a new monostable magnetron driver is needed to solve the above-mentioned problems. Disclosure of utility model In view of the drawbacks of the prior art, an object of the present utility model is to provide a monostable magnetic control driver. The monostable magnetic control driver comprises a high-voltage driving unit, a reverse voltage control unit, a high-voltage control unit, an independent power supply unit and a CPLD control end, wherein the reverse voltage control unit is connected with the high-voltage driving unit; The CPLD control end is electrically connected with the high-voltage control unit and transmits an opening/closing signal to the high-voltage control unit; the high-voltage driving unit is respectively and electrically connected with the high-voltage control unit and the circuit breaker, and the high-voltage driving unit performs switching on/off on the circuit breaker according to the switching on/off signal; The reverse voltage control unit is respectively and electrically connected with the CPLD control end and the breaker, and absorbs reverse voltage generated by switching on of the breaker when the breaker is switched on; the independent power supply unit is respectively and electrically connected with the high-voltage driving unit, the reverse voltage control unit and the high-voltage control unit and is used for providing isolation voltage. Preferably, the high-voltage driving unit comprises a first IGBT element, wherein a grid electrode of the first IGBT element is used for receiving a control input signal of the high-voltage control unit, when the grid electrode voltage is positive, the channel region is conducted, when the grid electrode voltage is negative, the channel region is cut off, and a source electrode and a drain electrode of the first IGBT element are connected with an opening/closing control end of the circuit breaker. Preferably, the reverse voltage control unit comprises a first logic output optocoupler and a second IGBT; The primary side of the first logic output optocoupler is connected with a CPLD control end and is used for generating current at the front end of the optocoupler according to a closing state judgment result of the CPLD control end, so that a phototriode at the secondary side is conducted, the secondary side of the first logic output optocoupler is connected with a grid electrode of a second IGBT and is used for generating forward voltage to control the channel region of the second IGBT to conduct, and a source electrode and a drain electrode of the second IGBT are connected with a circuit breaker to absorb reverse voltage generated by closing of the circuit breaker. Preferably, the high voltage control unit comprises a second logic output optocoupler; The primary side of the second logic output optocoupler is electrically connected with the CPLD control end and is used for inputting signals, so that an optocoupler input current is generated by a light-emitting diode on the primary side, the light-emitting diode is driven, a phototriode on the secondary side is conducted, current is generated in a loop, an output voltage is generated through a load resistor, the secondary side of the second logic output optocoupler is connected with the grid electrode of the first IGBT element, and the switching-on and switching-off signals of the