JP2900619B2 - Protective device for rotating electric machine for turbocharger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protection device for a rotary electric machine for a turbocharger for protecting a power circuit for controlling the operation of a motor-generator mounted on a rotary shaft of a turbocharger.

[0002]

2. Description of the Related Art In recent years, a turbocharger has been widely used in which a compressor is mounted on a turbine driven by exhaust gas and a supercharged air is supplied to an engine by a pneumatic operation of the compressor. An electric motor-generator is disposed in the electric motor to cause the rotating electric machine to perform electric drive or start operation according to the operation state of the engine, thereby assisting a supercharging operation of the turbocharger or regenerating electric power of exhaust energy. .

In controlling a rotating electric machine mounted on such a turbocharger, for example, a control apparatus for a rotating electric machine for a turbocharger, which controls supply electric power in accordance with the number of revolutions of the rotating electric machine, is disclosed in Japanese Patent Application Laid-Open No. HEI 1-1990. 155027
However, the power circuit is generally divided into parts such as a voltage conversion unit, an inverter unit, and a regulator unit, which are connected as shown in FIG. It is connected.

[0004]

In the power circuit of a rotating electric machine as described above, when an excessive current is generated due to a failure of a part of each part, the other parts and the battery are also adversely affected, and the running power is reduced. There is a possibility that danger may occur in the vehicle.

The present invention has been made in view of the above problems, and has as its object to protect a rotating electric machine for a turbocharger by solving the above-mentioned drawbacks by incorporating a protection circuit into a power circuit of the rotating electric machine. It is to provide a device.

[0006]

According to the present invention, there is provided a power circuit connected between a rotating electric machine disposed in a turbocharger and a battery for operating the rotating electric machine by electric / electric power generation. In a protection device for a rotary electric machine for a turbocharger to be protected, a fuse blown by an excessive current during an electric operation of the rotary electric machine, a current interrupting means capable of interrupting a main current between a battery and a power circuit, An apparatus for protecting a rotary electric machine for a turbocharger, comprising: an excessive detection means for detecting an excessive current and an excessive supply voltage to a battery to activate the current interrupting means.

[0007]

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a protection device for a rotary electric machine for a turbocharger according to the present invention.

In FIG. 1, reference numeral 1 denotes a power circuit which is connected between the rotating electric machine 2 and a battery 3 to control the operation of the rotating electric machine 2, and includes the following components.

Reference numeral 11 denotes a semiconductor control element GTO serving as a current interrupting means, which is an element for interrupting a main current by a current flowing through a gate. The fuse 12 which is interposed between the wires 13 and 13 and is blown at about 300 A is used for the other wire.

The voltage conversion section 13 boosts the battery voltage from 12 V to about 100 V. The boosted output is connected to an inverter section 14, and AC power of a predetermined frequency by the inverter section 14 is supplied to the rotating electric machine 2. You.

Reference numeral 15 denotes a regulator unit,
The AC output from the inverter is converted to DC by the inverter unit 14 to reduce the electric power of about 80 V to 15 V for charging. The output is supplied to the battery 3 via the GTO 11 described above.
It is connected to the. A shunt 16 is connected to a circuit from the regulator unit 15 to the battery 3, and measurement of a minute voltage by a current passing through the shunt 16 and measurement of a voltage supplied to the battery 3 are performed by the overvoltage control unit 17. When these values are excessive, the circuit is shut off by the GTO 11.

Reference numeral 4 denotes a controller, which issues a control command to the overvoltage control unit 17 to control its operation. Reference numeral 5 denotes a display, which displays an error or stop based on the operation of the overvoltage control unit 17 and displays a driver. Warning.

In the present embodiment configured as described above, for example, the failure of the internal
When an excessive current flows from the battery, the fuse 12 is cut off, the current is cut off, and an adverse effect on the battery 3 is prevented.
When a large current passes through the shunt 16 due to an excessive voltage at the time of failure of an internal element of the regulator unit 13 or a short circuit at an emergency, the GTO 11 operates based on the detected overvoltage control unit 17 to cut off the circuit. Re-energization is performed, and when the energization is normal, the operation is performed so that the energization is continued. An example of the operation in the present embodiment will be described with reference to the processing flowchart of FIG.

First, when the GTO 11 is turned on in step 1, the electric power from the rotating electric machine 2 driven by the exhaust energy is sent to the battery 3 via the inverter section 14 and the regulator section 13. In this case, the shunt 16 The current flowing through the overvoltage control unit 17 is an appropriate current value.
If the voltage value from the detection line A input to the terminal is not an excessive voltage, the process proceeds to step 5 via steps 3 and 4, and normal operation is performed.

In step 3, if an excessive current flows through the shunt 16 such that the + line contacts the ground side and short-circuits due to carelessness or the like, the process proceeds to step 6 and the GTO 11 is turned off under the control of the overvoltage control unit 17. Then, the current is momentarily cut off, and an error is displayed on the display in step 7, but in step 8, a signal is sent to the GTO 11 again based on a command from the controller 4 to turn on the circuit. Next, the value of the current passing through the shunt 16 is checked again, and if an excessive current is detected in step 9, the GTO 11 is turned off again to show a stop warning on the display 5 (steps 11 and 12). Step 10 if the current value is a predetermined value
And the normal operation is performed.

If it is determined in step 4 that the voltage is excessive, an abnormality is assumed to occur in the regulator unit 15 or the like. Therefore, the process proceeds to step 13, where the GTO 11 is turned off by the control of the overvoltage control unit 17, and the display is performed. The stop is displayed on the device 5 to warn the driver.

As described above, the present invention has been described using the above-described embodiment. However, various modifications are possible within the scope of the present invention, and these modifications are not excluded from the scope of the present invention.

According to the present invention, as described in the above embodiment, a GTO is provided in a power circuit for controlling a rotating electric machine to perform disconnection control based on an excessive current, and a fuse to be disconnected is arranged. When an abnormality occurs in the power circuit, the effect of protecting the battery can be obtained by disconnecting the battery circuit by using a GTO or a fuse.
When the + line is inadvertently grounded, the GTO is momentarily cut off to prevent an adverse effect on the battery. Further, when the power supply is performed again and the current value is normal, the power supply is continued.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram showing one embodiment of a protection device for a rotary electric machine for a turbocharger according to the present invention.

FIG. 2 is a processing flowchart illustrating an example of the operation of the present embodiment.

FIG. 3 is a block diagram illustrating an example of an internal configuration of a power circuit of a conventional rotating electric machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Power circuit 2 ... Rotating electric machine 3 ... Battery 4 ... Controller 5 ... Display 11 ... GTO 12 ... Fuse 17 ... Overvoltage control part

Claims (3)

(57) [Claims] 1. A protection device for a rotary electric machine for a turbocharger, which is connected between a rotary electric machine arranged in a turbocharger and a battery, and protects a power circuit for operating the rotary electric machine for electric / power generation. A fuse blown by an excessive current at the time, a current interrupting unit capable of interrupting a main current between the battery and the power circuit, and detecting the excessive current of the main current and the excessive supply voltage to the battery to detect the excessive current. A protection device for a rotary electric machine for a turbocharger, comprising: an excessive detection means for operating the means. 2. The system according to claim 1, wherein said excessive detecting means activates the current interrupting means instantaneously when the main current is excessive, re-energizes the electric current, and continues the energizing when the normal current is detected. Protection device for rotating electric machine for turbocharger. 3. The protection device for a rotary electric machine for a turbocharger according to claim 1, wherein said current interruption means employs a GTO comprising a semiconductor control element.