CN212827903U - Circuit and device for combining active discharge and emergency discharge - Google Patents
Circuit and device for combining active discharge and emergency discharge Download PDFInfo
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- CN212827903U CN212827903U CN202021526424.9U CN202021526424U CN212827903U CN 212827903 U CN212827903 U CN 212827903U CN 202021526424 U CN202021526424 U CN 202021526424U CN 212827903 U CN212827903 U CN 212827903U
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Abstract
The utility model discloses a be used for initiative discharge and emergency discharge to combine together circuit and device, the circuit includes optical coupler IC1, triode Q1, triode Q2 and relay KM1, wherein: a pin 2 on the primary side of the optical coupler IC1 is connected with a collector of the triode Q2, a resistor R1 is further connected on the primary side of the optical coupler IC1, one end of the resistor R1 is connected with a pin 1 on the primary side of the optical coupler IC1, the other end of the resistor R1 is connected with a low-voltage power supply, and a pin 3 on the secondary side of the optical coupler IC1 is connected with a base of the triode Q1. The utility model discloses a to initiatively discharge and combine together with emergency discharge, can replace the passive discharge circuit in the controller, can replace the initiative discharge circuit simultaneously, emergency discharge circuit and passive discharge circuit integrate the function of three kinds of circuits in a module, have reduced the circuit module, and control is simple. And, the safety of the controller is also increased due to the existence of the emergency discharge circuit.
Description
Technical Field
The utility model belongs to the technical field of car circuit, in particular to be used for initiatively discharging and emergency discharge combined circuit and device.
Background
Generally, in an electric vehicle controller, in a specific situation, the electricity of a bus capacitor needs to be discharged quickly, and an active discharge circuit needs to be added to a circuit. Meanwhile, when the motor controller works on the whole vehicle, the situation that low voltage electricity disappears or the control core MCU cannot work normally due to some abnormal conditions may occur, at this time, in order to ensure the safety of the controller and the accessory equipment, the electricity in the capacitor needs to be discharged emergently, but the active discharge is not well realized because the controller is in an out-of-control state at this time.
Therefore, a discharge circuit is needed to solve the above-mentioned technical problems.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a circuit for combining active discharge and emergency discharge, the circuit includes an optical coupler IC1, a transistor Q1, a transistor Q2 and a relay KM1, wherein:
a pin 2 on the primary side of the optical coupler IC1 is connected with a collector of a triode Q2, the primary side of the optical coupler IC1 is also connected with a resistor R1, one end of the resistor R1 is connected with a pin 1 on the primary side of the optical coupler IC1, the other end of the resistor R1 is connected with a low-voltage power supply, a pin 3 on the secondary side of the optical coupler IC1 is connected with a base of the triode Q1, a pin 4 on the secondary side of the optical coupler IC1 is connected with a pin 3 of a relay, and a pin 4 on the secondary side of the optical coupler IC1 and a pin 3 of the relay are simultaneously connected with an emergency power supply;
a base electrode of the triode Q2 is connected with a resistor R2, one end of the resistor R2 is connected with a base electrode of the triode Q2, the other end of the resistor R2 is connected with a discharge control signal, and an emitting electrode of the triode Q2 is grounded;
the collector of the triode Q1 is connected with a pin 4 of the relay, and the emitter of the triode Q1 is grounded;
Further, a resistor R4 is arranged between the triode Q2 and the resistor R2, one end of the resistor R4 is connected with the base of the triode Q2 and one end of the resistor R2, and the other end of the resistor R4 is grounded.
Furthermore, a capacitor C1 is connected in parallel to two ends of the resistor R4, one end of the capacitor C1 is connected to the base of the transistor Q2 and one end of the resistor R2, and the other end of the capacitor C1 is grounded.
Furthermore, a resistor R3 is connected to the pin 3 on the secondary side of the optocoupler IC1, one end of the resistor R3 is connected to the pin 3 on the secondary side of the optocoupler IC1, and the other end of the resistor R3 is grounded.
The utility model also provides a be used for initiatively discharging and the emergency discharge combination device, the device includes foretell be used for initiatively discharging and the emergency discharge combination circuit.
The utility model discloses a to initiatively discharge and combine together with emergency discharge, can replace the passive discharge circuit in the controller, can replace the initiative discharge circuit simultaneously, emergency discharge circuit and passive discharge circuit integrate the function of three kinds of circuits in a module, have reduced the circuit module, and control is simple. And, the safety of the controller is also increased due to the existence of the emergency discharge circuit.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 shows a schematic circuit diagram for combining active discharge and emergency discharge according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a be used for initiatively discharging and emergency discharge combined circuit, it is exemplary, fig. 1 shows the utility model discloses a be used for initiatively discharging and emergency discharge combined circuit schematic diagram, as shown in fig. 1, the circuit includes optical coupler IC1, triode Q1, triode Q2 and relay KM1, wherein:
a pin 2 on the primary side of the optical coupler IC1 is connected with a collector of a triode Q2, a resistor R1 is further connected on the primary side of the optical coupler IC1, one end of the resistor R1 is connected with a pin 1 on the primary side of the optical coupler IC1, the other end of the resistor R1 is connected with a low-voltage power supply, a pin 3 on the secondary side of the optical coupler IC1 is connected with a base of the triode Q1, a pin 4 on the secondary side of the optical coupler IC1 is connected with a pin 3 of a relay, and a pin 4 on the secondary side of the optical coupler IC1 and a pin 3 of the relay are simultaneously connected with an emergency power supply. The pin 3 of the secondary side of the optical coupler IC1 is also connected with a resistor R3, one end of the resistor R3 is connected with the pin 3 of the secondary side of the optical coupler IC1, and the other end of the resistor R3 is grounded.
The base electrode of the triode Q2 is connected with a resistor R2, one end of the resistor R2 is connected with the base electrode of the triode Q2, the other end of the resistor R2 is connected with a discharge control signal, and the emitting electrode of the triode Q2 is grounded. A resistor R4 is arranged between the triode Q2 and the resistor R2, one end of the resistor R4 is connected with the base of the triode Q2 and one end of the resistor R2, and the other end of the resistor R4 is grounded. Two ends of the resistor R4 are connected in parallel with a capacitor C1, one end of the capacitor C1 is connected with the base electrode of the triode Q2 and one end of the resistor R2, and the other end of the capacitor C1 is grounded.
The collector of the transistor Q1 is connected to pin 4 of the relay, and the emitter of the transistor Q1 is grounded.
The utility model also provides a be used for initiatively discharging and the emergency discharge combination device, the device includes foretell be used for initiatively discharging and the emergency discharge combination circuit.
The embodiment of the utility model provides an can use in new energy automobile motor controller, possess initiative discharge, the passive discharge circuit of fungible simultaneously of emergency discharge function.
The specific implementation process is as follows:
step 1: when the controller works normally and does not need to enter a discharging state, a discharging control signal at one end of the resistor R2 keeps a high level, the triode Q2 is conducted at the moment, and a low-voltage power supply flows through the primary side of the optical coupler IC1 through the resistor R1 to enable the secondary side of the optical coupler IC1 to be conducted; the emergency power supply passes through the secondary side of the optical coupler IC1 and flows through the resistor R3 to conduct the triode Q1, at the moment, the triode Q1 is conducted to enable the coil of the relay KM1 to be electrified, the relay KM1 is normally closed, when the coil of the relay KM1 is electrified, the contact is normally opened, the discharging resistor RT1 cannot discharge charges in the bus capacitor, and the controller works normally.
Step 2: when the controller works normally and needs to enter an active discharge state, a discharge control signal at one end of the resistor R2 is changed into a low level, the triode Q2 is not conducted, the optical coupler IC1 is not conducted, the triode Q1 is not conducted, no current passes through the coil of the relay KM1, the relay KM1 keeps a normally closed state, and the bus capacitor starts to discharge through the discharge resistor RT 1.
And step 3: when the controller works abnormally or the low-voltage power supply is abnormal, such as the low-voltage power supply disappears and the like, the optical coupler IC1 is not conducted, the triode Q1 is not conducted, the coil of the relay KM1 does not have current, the relay KM1 keeps a normally closed state, and the bus capacitor starts to discharge through the discharge resistor RT 1.
And 4, step 4: usually, after the controller stops working, passive discharge is needed to discharge the charges in the capacitor; when passive discharge is needed, after the controller is powered down, the circuit starts to work according to the logic of the step 3, and charges in the capacitor are discharged.
And 5: the resistance value of the discharge resistor RT1 can be selected at normal temperature, and a proper resistance value is selected according to actual conditions so as to achieve the required discharge time and requirements.
Step 6: the discharge resistor RT1 selects a positive temperature coefficient PTC resistor, if the control circuit breaks down, the resistor enters a normal discharge state, the resistance value of the resistor increases along with the rise of the temperature, and the resistor is prevented from being damaged due to heating.
And 7: relay KM1 required normally closed contacts.
The embodiment of the utility model provides a through combining together initiative discharge and emergency discharge, can replace the passive discharge circuit in the controller, can replace the initiative discharge circuit simultaneously, emergency discharge circuit and passive discharge circuit integrate the function of three kinds of circuits in a module, have reduced the circuit module, and control is simple. And, the safety of the controller is also increased due to the existence of the emergency discharge circuit.
Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (5)
1. A circuit for combining active discharge and emergency discharge, comprising an optocoupler IC1, a transistor Q1, a transistor Q2, and a relay KM1, wherein:
a pin 2 on the primary side of the optical coupler IC1 is connected with a collector of a triode Q2, the primary side of the optical coupler IC1 is also connected with a resistor R1, one end of the resistor R1 is connected with a pin 1 on the primary side of the optical coupler IC1, the other end of the resistor R1 is connected with a low-voltage power supply, a pin 3 on the secondary side of the optical coupler IC1 is connected with a base of the triode Q1, a pin 4 on the secondary side of the optical coupler IC1 is connected with a pin 3 of a relay, and a pin 4 on the secondary side of the optical coupler IC1 and a pin 3 of the relay are simultaneously connected with an emergency power supply;
a base electrode of the triode Q2 is connected with a resistor R2, one end of the resistor R2 is connected with a base electrode of the triode Q2, the other end of the resistor R2 is connected with a discharge control signal, and an emitting electrode of the triode Q2 is grounded;
the collector of the triode Q1 is connected with a pin 4 of the relay, and the emitter of the triode Q1 is grounded;
pin 1 of the relay KM1 is grounded, pin 2 of the relay KM1 is connected with one end of a discharge resistor RT1, and the other end of the discharge resistor RT1 is connected with a bus.
2. The combined active discharge and emergency discharge circuit of claim 1, wherein a resistor R4 is disposed between the transistor Q2 and the resistor R2, one end of the resistor R4 is connected to the base of the transistor Q2 and one end of the resistor R2, and the other end of the resistor R4 is grounded.
3. The combined circuit of claim 2, wherein a capacitor C1 is connected in parallel to two ends of the resistor R4, one end of the capacitor C1 is connected to the base of the transistor Q2 and one end of the resistor R2, and the other end of the capacitor C1 is grounded.
4. The combined active discharge and emergency discharge circuit of claim 3, wherein a resistor R3 is further connected to pin 3 of the secondary side of the optocoupler IC1, one end of the resistor R3 is connected to pin 3 of the secondary side of the optocoupler IC1, and the other end of the resistor R3 is grounded.
5. A combination device for active discharge and emergency discharge, comprising a combination circuit for active discharge and emergency discharge as claimed in any one of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021526424.9U CN212827903U (en) | 2020-07-28 | 2020-07-28 | Circuit and device for combining active discharge and emergency discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021526424.9U CN212827903U (en) | 2020-07-28 | 2020-07-28 | Circuit and device for combining active discharge and emergency discharge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212827903U true CN212827903U (en) | 2021-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021526424.9U Active CN212827903U (en) | 2020-07-28 | 2020-07-28 | Circuit and device for combining active discharge and emergency discharge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212827903U (en) |
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2020
- 2020-07-28 CN CN202021526424.9U patent/CN212827903U/en active Active
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