CN208337431U - A kind of power protecting circuit for automatic transfer switch controller - Google Patents
A kind of power protecting circuit for automatic transfer switch controller Download PDFInfo
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- CN208337431U CN208337431U CN201820735632.6U CN201820735632U CN208337431U CN 208337431 U CN208337431 U CN 208337431U CN 201820735632 U CN201820735632 U CN 201820735632U CN 208337431 U CN208337431 U CN 208337431U
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Abstract
The utility model discloses a kind of power protecting circuits for automatic transfer switch controller; including transformer, bridge rectifier; the secondary coil of transformer is connected to the input terminal of bridge rectifier, further includes resistance R1, resistance R2, protective resistance F1, diode D2, diode D3, diode D4, IGBT pipe Q1 and voltage regulation filtering unit；Power protecting circuit for automatic transfer switch controller is simple, high reliablity; with IGBT voltage control characteristic; it realizes the voltage protection to controller internal work power supply, while being realized using transformer, rectifier bridge and sampling resistor and the all-wave of working power loop current in controller is sampled.
Description
Technical field
The utility model relates to automatic change-over technical fields, in particular to a kind of to be used for automatic transfer switch controller
Power protecting circuit.
Background technique
The design method of traditional controller power supply protection circuit is exactly at pressure-changing secondary side both ends as shown in Figure 1:
Transient state inhibits zener diode to limit voltage value, and the overvoltage of transient state acts on working power transformer, secondary side both ends transient state
Overvoltage may result in diode current flow, current surge, component wear, and not in controller to working power circuit electricity
Stream is detected.
Utility model content
The purpose of the utility model is to provide a kind of power protecting circuits for automatic transfer switch controller.
For this purpose, technical solutions of the utility model are as follows:
A kind of power protecting circuit for automatic transfer switch controller, including transformer, bridge rectifier, transformation
The secondary coil of device is connected to the input terminal of bridge rectifier, further includes resistance R1, resistance R2, protective resistance F1, diode
D2, diode D3, diode D4, IGBT pipe Q1 and voltage regulation filtering unit；The anode of the bridge rectifier output end passes through
Resistance R2 ground connection；The cathode of the bridge rectifier output end connects the cathode of diode D2 by resistance R1, diode D2's
Plus earth；The collector of IGBT pipe Q1 connects the cathode of bridge rectifier output end, and the gate pole of IGBT pipe Q1 meets diode D2
Cathode；The emitter of IGBT pipe Q1 meets supply voltage VIN by protective resistance F1；The anode of diode D4 connects diode D2's
Cathode；The cathode of diode D4 connects the cathode of diode D3；The anode of diode D3 connects the emitter of IGBT pipe Q1；Voltage regulation filtering
Unit is arranged between supply voltage VIN and ground.
Further, the voltage regulation filtering unit includes diode D5, capacitor C1 and capacitor C2；The cathode of diode D5
Connect supply voltage VIN, plus earth；Capacitor C1 and capacitor C2 is connected in parallel on the both ends of diode D5.
Further, the model N-channel MOS FET 3055 of the IGBT pipe Q1.
Further, the resistance R2 is sampling resistor, and resistance value size is 2 Ω.
Compared with prior art, this be used for automatic transfer switch controller power protecting circuit is simple, high reliablity, fortune
With IGBT voltage control characteristic, realize the voltage protection to controller internal work power supply, at the same using transformer, rectifier bridge and
Sampling resistor, which is realized, samples the all-wave of working power loop current in controller.
Detailed description of the invention
Fig. 1 is that existing controller power supply protects circuit diagram figure.
Fig. 2 is the circuit diagram of the power protecting circuit provided by the utility model for automatic transfer switch controller.
Specific embodiment
With reference to the accompanying drawing and specific embodiment is described further the utility model, but following embodiments are right absolutely not
The utility model has any restrictions.
A kind of power protecting circuit for automatic transfer switch controller, as shown in Fig. 2, whole including transformer, bridge-type
The secondary coil of current circuit, transformer is connected to the input terminal of bridge rectifier, as shown in Fig. 2, further including resistance R1, resistance
R2, protective resistance F1, diode D2, diode D3, diode D4, IGBT pipe Q1 and voltage regulation filtering unit；The bridge rectifier
The anode of circuit output end is grounded by resistance R2；The cathode of the bridge rectifier output end connects diode by resistance R1
The cathode of D2, the plus earth of diode D2；The collector of IGBT pipe Q1 connects the cathode of bridge rectifier output end, IGBT pipe
The gate pole of Q1 connects the cathode of diode D2；The emitter of IGBT pipe Q1 meets supply voltage VIN by protective resistance F1；Diode D4
Anode connect the cathode of diode D2；The cathode of diode D4 connects the cathode of diode D3；The anode of diode D3 connects IGBT pipe
The emitter of Q1；Voltage regulation filtering unit is arranged between supply voltage VIN and ground.
Wherein, the voltage regulation filtering unit includes diode D5, capacitor C1 and capacitor C2；The cathode of diode D5 connects electricity
Source voltage VIN, plus earth；Capacitor C1 and capacitor C2 is connected in parallel on the both ends of diode D5.
Specifically, the model N-channel MOS FET 3055 of the IGBT pipe Q1.
Further, the resistance R2 is sampling resistor, and resistance value size is 2 Ω.
The course of work of power protecting circuit provided by the utility model for automatic transfer switch controller is as follows:
The secondary side of transformer T1 exports 24 volts of alternating currents, and maximum current is about 400 milliamperes, working power electricity in controller
Pressure VIN working range is 15V-60V；
1. working power loop current detection process is as follows in controller:
The secondary side of transformer T1 connects rectifier bridge D1 input terminal 1 and 3, the connection sampling electricity of negative output terminal 4 of rectifier bridge D1
The one end R2 is hindered, the resistance R2 other end is grounded GND, and electric current I is flowed out from the positive output end 2 of rectifier bridge D1, flows finally by resistance R2
Enter the negative output terminal 4 of rectifier bridge D1, the DC voltage U1=I*R2=0.8V over the ground of resistance R2, controller acquires and judges voltage
The value of U1, goes beyond the scope, alarm.
2. working power voltage VIN is as follows in controller:
The collector of the anode connection IGBT pipe Q1 of rectifier bridge D1, the collector terminal of IGBT pipe Q1 are connect by series resistance R1
Gate pole to gate pole G, the IGBT pipe Q1 of IGBT pipe Q1 connects diode D2 cathode, the plus earth GND of diode D2；IGBT pipe
Increase zener diode D3 and D4 (reliably turn off and be connected to guarantee) between the gate pole of Q1 and the emitter of IGBT pipe Q1,
The emitter series connection protective resistance F1 of IGBT pipe Q1 is connected to the cathode of diode D5, and the cathode and capacitor C1 of diode D5 is just
Pole, one end of capacitor C2 are in parallel, the anode of diode D5, the cathode of capacitor C1, capacitor C2 other end earth.
When rated supply voltage works, the gate voltage value of IGBT pipe Q1 is 24V, and diode D2 does not work, IGBT pipe Q1
Door emitter-base bandgap grading be forward bias, IGBT pipe Q1 conducting, capacitor C1's charges to 24V, the gate voltage peak value 34V of IGBT pipe Q1
When, IGBT pipe Q1 conducting, capacitor C1's continues to charge, when the gate voltage of IGBT pipe Q1 declines, the door emitter-base bandgap grading electricity of IGBT pipe Q1
It forces down, IGBT pipe Q1 is turned off slowly, and supply voltage VIN voltage reduces, and supply voltage VIN remains 32V.
Supply voltage rises, when the gate voltage value of IGBT pipe Q1 is greater than 47V, diode D2 work, and the door of IGBT pipe Q1
Emitter voltage is low, IGBT pipe Q1 shutdown, the electric discharge of capacitor C1, since the energy storage of capacitor C1 acts on, the voltage model of supply voltage VIN
It encloses for 36V~47V, realizes the protection of working power voltage in controller.
Claims (4)
1. a kind of power protecting circuit for automatic transfer switch controller, including transformer, bridge rectifier, transformer
Secondary coil be connected to the input terminal of bridge rectifier, which is characterized in that further include resistance R1, resistance R2, protective resistance
F1, diode D2, diode D3, diode D4, IGBT pipe Q1 and voltage regulation filtering unit；The bridge rectifier output end
Anode is grounded by resistance R2；The cathode of the bridge rectifier output end connects the cathode of diode D2 by resistance R1, and two
The plus earth of pole pipe D2；The collector of IGBT pipe Q1 connects the cathode of bridge rectifier output end, and the gate pole of IGBT pipe Q1 connects
The cathode of diode D2；The emitter of IGBT pipe Q1 meets supply voltage VIN by protective resistance F1；The anode of diode D4 connects two
The cathode of pole pipe D2；The cathode of diode D4 connects the cathode of diode D3；The anode of diode D3 connects the emitter of IGBT pipe Q1；
Voltage regulation filtering unit is arranged between supply voltage VIN and ground.
2. the power protecting circuit according to claim 1 for automatic transfer switch controller, which is characterized in that described
Voltage regulation filtering unit include diode D5, capacitor C1 and capacitor C2；The cathode of diode D5 meets supply voltage VIN, and anode connects
Ground；Capacitor C1 and capacitor C2 is connected in parallel on the both ends of diode D5.
3. the power protecting circuit according to claim 1 for automatic transfer switch controller, which is characterized in that described
IGBT pipe Q1 model N-channel MOS FET 3055.
4. the power protecting circuit according to claim 1 for automatic transfer switch controller, which is characterized in that described
Resistance R2 be sampling resistor, resistance value size be 2 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820735632.6U CN208337431U (en) | 2018-05-17 | 2018-05-17 | A kind of power protecting circuit for automatic transfer switch controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820735632.6U CN208337431U (en) | 2018-05-17 | 2018-05-17 | A kind of power protecting circuit for automatic transfer switch controller |
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| Publication Number | Publication Date |
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| CN208337431U true CN208337431U (en) | 2019-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820735632.6U Active CN208337431U (en) | 2018-05-17 | 2018-05-17 | A kind of power protecting circuit for automatic transfer switch controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737264A (en) * | 2020-09-10 | 2021-04-30 | 西南交通大学 | Weak multistable vibration power generation device based on rolling magnet |
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2018
- 2018-05-17 CN CN201820735632.6U patent/CN208337431U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112737264A (en) * | 2020-09-10 | 2021-04-30 | 西南交通大学 | Weak multistable vibration power generation device based on rolling magnet |
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