CN216056960U - ASC control circuit for motor controller - Google Patents

Abstract

The utility model relates to an ASC control circuit for a motor controller, comprising: a high-voltage emergency power supply; the driving chip is provided with a first pin and a second pin; the anode of the first diode is connected with the first pin of the driving chip; an IGBT circuit, one end of which is connected with the cathode of the first diode; the source electrode of the first NMOS field effect transistor is electrically connected to the second pin of the driving chip, the drain electrode of the first NMOS field effect transistor is electrically connected to the IGBT circuit, and the grid electrode of the first NMOS field effect transistor is externally connected with a driving power supply; the source electrode of the second NMOS field effect transistor is electrically connected to the positive electrode of the high-voltage emergency power supply, and the drain electrode of the second NMOS field effect transistor is electrically connected to the IGBT circuit; a collector of the first triode is electrically connected with the grid of the second NMOS field effect transistor; and the voltage division circuit is connected between the base electrode of the first triode and the high-voltage emergency power supply. The whole anti-interference performance of the circuit is improved, and the integration level of the circuit is improved.

Description

ASC control circuit for motor controller

Technical Field

The utility model relates to the field of motor control, in particular to an ASC controller for a motor controller.

Background

When a motor control system has safety-related faults, the system is required to be switched into a safety mode firstly, the torque output of a motor is closed, a vehicle is in a coasting state, and the vehicle is in a safety state, so that the personal safety is ensured. There are two ways to turn off the torque output of the motor: one is a way of completely turning off the three-phase bridge arm IGBT of the motor, and the system can enter a completely turned-off state by a method of closing all IGBT tubes (namely Q1-Q6) of the three-phase bridge arm IGBT of the motor.

The circuit structure among the prior art realizes the cost higher, and the chip self interference killing feature is poor simultaneously, triggers the ASC function by mistake easily, and secondly, realizes that the structure is comparatively complicated, and occupation space structure is great, is unfavorable for the safety of supply chain.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide an ASC control circuit for a motor controller, aiming at the problems of poor interference resistance and large occupied space of the circuit structure chip in the prior art.

An ASC control circuit for a motor controller comprising:

a high-voltage emergency power supply;

the driving chip is provided with a first pin and a second pin;

the anode of the first diode is connected with the first pin of the driving chip;

an IGBT circuit, one end of which is connected with the cathode of the first diode;

the source electrode of the first NMOS field effect transistor is electrically connected to the second pin of the driving chip, the drain electrode of the first NMOS field effect transistor is electrically connected to the IGBT circuit, and the grid electrode of the first NMOS field effect transistor is externally connected with a driving power supply;

the source electrode of the second NMOS field effect transistor is electrically connected to the positive electrode of the high-voltage emergency power supply, and the drain electrode of the second NMOS field effect transistor is electrically connected to the IGBT circuit;

a collector of the first triode is electrically connected with the grid of the second NMOS field effect transistor;

and the voltage division circuit is connected between the base electrode of the first triode and the high-voltage emergency power supply.

In one preferred embodiment, the voltage divider circuit includes:

the first resistor is connected between the positive electrode of the high-voltage emergency power supply and the base electrode of the first triode;

and the second resistor is connected between the base electrode of the first triode and the grounding end.

In one preferred embodiment, the ASC control circuit further includes:

and the third resistor is connected between the drain electrode and the grid electrode of the second NMOS field effect transistor in parallel.

In one preferred embodiment, the ASC control circuit further includes:

and the fourth resistor is electrically connected between the cathode of the first diode and the IGBT circuit.

In one preferred embodiment, the ASC control circuit further includes:

and the fifth resistor is electrically connected between the drain electrode of the first NMOS field effect transistor and the IGBT circuit.

In one preferred embodiment, the ASC control circuit further includes:

one end of the sixth resistor is connected in series with the drain electrode of the second NMOS field effect transistor;

and the anode of the second triode is electrically connected with the sixth resistor, and the cathode of the second triode is electrically connected with the IGBT circuit.

In one preferred embodiment, the ASC control circuit further includes:

and the seventh resistor is electrically connected between the grid of the second NMOS field effect transistor and the external driving power supply.

In one preferred embodiment, the negative pole of the high-voltage emergency power supply is grounded.

In one preferred embodiment, the high voltage emergency power supply provides 15V driving voltage.

The embodiment discloses an ASC control circuit for a motor controller, which improves the overall anti-interference performance of the circuit and improves the integration level of the circuit.

Drawings

Fig. 1 is a schematic circuit diagram of an ASC control circuit for a motor controller according to a preferred embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, a preferred embodiment of the present invention discloses an ASC control circuit 100 for a motor controller, wherein the ASC control circuit 100 includes a high-voltage emergency power supply 110, a driving chip 120, an IGBT circuit 130, a first diode D1, a first NMOS fet Q1, a second NMOS fet Q2, a first transistor Q3, and a voltage divider circuit 140.

Specifically, the driving chip 120 has a first pin OUTH and a second pin OUTL; the anode of the first diode D1 is connected to the first pin OUTH of the driving chip; one end of the IGBT circuit 130 is connected to the negative electrode of the first diode D1; the source of the first NMOS field-effect transistor Q1 is electrically connected to the second pin OUTL of the driving chip 110, the drain is electrically connected to the IGBT circuit 130, and the gate of the first NMOS field-effect transistor Q1 is externally connected to a driving power supply;

in more detail, the ASC control circuit 100 further includes a fourth resistor R4 and a fifth resistor R5, and the fourth resistor R4 is electrically connected between the cathode of the first diode D1 and the IGBT circuit 130. The fifth resistor R5 is electrically connected between the drain of the first NMOS fet Q1 and the IGBT circuit 130.

The driving chip 120 has a first pin OUTH loop connected to the fourth resistor R4 through the first diode D1, so that the driving chip 120 operates normally. The driving chip 120 has a second pin OUTL connected to the fifth resistor R5 through the first NMOS fet Q1, and drives the 15V power supply to turn off the NMOS, so that the driving chip 120 stops driving.

The source of the second NMOS fet Q2 is electrically connected to the positive electrode of the high voltage emergency power supply 110, and the drain is electrically connected to the IGBT circuit; the collector of the first transistor Q3 is electrically connected to the gate of the second NMOS fet Q2, and the voltage divider circuit 140 is connected between the base of the first transistor Q3 and the high voltage emergency power supply 110.

And the negative electrode of the high-voltage emergency power supply is grounded. The high-voltage emergency power supply provides 15V driving voltage.

Specifically, the ASC control circuit 100 further includes a sixth resistor R6 and a second transistor D2. One end of a sixth resistor R6 is connected in series with the drain of the second NMOS field effect transistor Q2; the anode of the second transistor D2 is electrically connected to the cathode of the sixth resistor R6 and the IGBT circuit 140.

When the external driving power supply is powered off normally, the first NMOS field effect transistor Q1 is turned off, the emergency power supply 110 provides a 15V emergency power supply, the IGBT is powered through the diode, the IGBT circuit 130 is turned on, and the ASC function is completed.

In this embodiment, the voltage divider circuit 140 includes a first resistor R1 and a second resistor R2. The first resistor R1 is connected between the anode of the high-voltage emergency power supply 110 and the base of the first triode Q3; the second resistor R2 is connected between the base of the first transistor Q3 and ground.

The ASC control circuit further includes a third resistor R3, and the third resistor R3 is connected in parallel between the drain and the gate of the second NMOS fet Q2.

The ASC control circuit 100 further includes a seventh resistor R7, and the seventh resistor R7 is electrically connected between the gate of the second NMOS fet Q2 and the external driving power source.

The embodiment discloses an ASC control circuit for a motor controller, which improves the overall anti-interference performance of the circuit and improves the integration level of the circuit.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (9)

1. An ASC control circuit for a motor controller, comprising:

a high-voltage emergency power supply;

the driving chip is provided with a first pin and a second pin;

the anode of the first diode is connected with the first pin of the driving chip;

an IGBT circuit, one end of which is connected with the cathode of the first diode;

the source electrode of the first NMOS field effect transistor is electrically connected to the second pin of the driving chip, the drain electrode of the first NMOS field effect transistor is electrically connected to the IGBT circuit, and the grid electrode of the first NMOS field effect transistor is externally connected with a driving power supply;

the source electrode of the second NMOS field effect transistor is electrically connected to the positive electrode of the high-voltage emergency power supply, and the drain electrode of the second NMOS field effect transistor is electrically connected to the IGBT circuit;

a collector of the first triode is electrically connected with the grid of the second NMOS field effect transistor;

and the voltage division circuit is connected between the base electrode of the first triode and the high-voltage emergency power supply.

2. The ASC control circuit for a motor controller of claim 1, wherein said voltage divider circuit comprises:

the first resistor is connected between the positive electrode of the high-voltage emergency power supply and the base electrode of the first triode;

and the second resistor is connected between the base electrode of the first triode and the grounding end.

3. The ASC control circuit for a motor controller of claim 2, further comprising:

and the third resistor is connected between the drain electrode and the grid electrode of the second NMOS field effect transistor in parallel.

4. The ASC control circuit for a motor controller of claim 1, further comprising:

and the fourth resistor is electrically connected between the cathode of the first diode and the IGBT circuit.

5. The ASC control circuit for a motor controller of claim 1, further comprising:

and the fifth resistor is electrically connected between the drain electrode of the first NMOS field effect transistor and the IGBT circuit.

6. The ASC control circuit for a motor controller of claim 1, further comprising:

one end of the sixth resistor is connected in series with the drain electrode of the second NMOS field effect transistor;

and the anode of the second triode is electrically connected with the sixth resistor, and the cathode of the second triode is electrically connected with the IGBT circuit.

7. The ASC control circuit for a motor controller of claim 1, further comprising:

and the seventh resistor is electrically connected between the grid of the second NMOS field effect transistor and the external driving power supply.

8. The ASC control circuit for a motor controller of claim 1 wherein a negative pole of said high voltage emergency power supply is grounded.

9. The ASC control circuit for a motor controller of claim 1 wherein said high voltage emergency power supply provides 15V drive voltage.

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