JPH0314881Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vehicle control circuit opener for an electric vehicle.

[Conventional technology]

In recent years, devices using electronic circuits have been frequently used in vehicle controllers, and DC circuits that supply DC to semiconductor elements such as transistors, diodes, and ICs are required to have constant voltage characteristics with little fluctuation. A large capacity smoothing capacitor is usually connected between the positive and negative terminals of this DC circuit.

However, even when stopped, the electric charge remains and is dangerous, so when inspecting or removing the electronic circuit, it was necessary to manually discharge it using a shorting rod or shorting switch.

[The problem that the idea attempts to solve]

Manually discharging the capacitor using a shorting rod or shorting switch after turning off the power causes a large electric shock that shorts out the large charge in the capacitor, which is dangerous to the electronic circuit, and also poses safety issues as it may be forgotten. I'm here.

[Means to solve the problem]

The present invention has been developed in view of the above-mentioned problems.

That is, a B contact linked to a vehicle control circuit opener operated when the vehicle controller is stopped is used to utilize the discharge circuit to discharge the charge in the capacitor.

[Effect]

When the vehicle controller is stopped, the vehicle control circuit opener is operated, so if the B contact is connected to this and the terminals of the capacitor are short-circuited by the discharge resistor, when the vehicle controller is stopped, the charge in the capacitor will be removed through the discharge resistor. can be eliminated.

〔Example〕

FIG. 1 is an explanatory diagram showing an embodiment of a control circuit opener for a vehicle according to the present invention.

In the figure, 1 is a vehicle control circuit opener, 2 is a vehicle controller, 3 is an electronic circuit, 4 is a DC circuit, 5 is a discharge circuit, 6 is a discharge resistor, 7 is a capacitor, 8 is an AC power supply, 9 is a control Circuit command line, 10, 11, 12, 1
3 is a contact point, 10a, 11a, 12a, 13b are cams, and A and B are on and off positions of the vehicle control circuit opener device 1.

In FIG. 1, an AC power source 8 is normally supplied from an auxiliary power source, is rectified by a DC circuit 4, and is prevented from fluctuating by a smoothing capacitor 7 to supply a constant DC voltage to the electronic circuit 3. Various command mode signals are sent to the electronic circuit 3 via a control circuit command line 9.

When the vehicle controller 2 is not in use, the vehicle control circuit opener 1 is switched to the off position B, and the AC power supply 8 and control circuit command line 9 are all cut off, and the contact 13 is closed by the cam 13b, causing accumulation in the capacitor 7. The generated charges are discharged by a discharge circuit 5 comprising a contact 13 and a discharge resistor 6. The discharge resistor 6 limits the large current when discharging the residual voltage of the capacitor 7, and the contact 13
This is provided to prevent welding.

[Effect of idea]

As explained above, if the vehicle control circuit opener according to the present invention is used in a vehicle controller, by setting the vehicle control circuit opener to the off position, the power supply to the electronic circuit is cut off and at the same time DC voltage fluctuation Rapidly discharge the residual charge of the capacitor to prevent
We can provide an exceptional device that allows you to safely inspect and remove electronic devices.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of a control circuit opener for a vehicle according to the present invention. DESCRIPTION OF SYMBOLS 1... Vehicle control circuit opener, 2... Vehicle controller, 3... Electronic circuit, 4... Direct current circuit, 5... Discharge circuit, 6... Discharge resistor, 7... Capacitor, 8
...AC power supply, 9...Control circuit command line, 10,1
1, 12, 13...Contact, 10a, 11a, 12
a, 13b...cam, A...in position, B...off position.

Claims (1)

[Scope of utility model registration request] A control circuit opener for a vehicle having contacts 10, 11, 12, 13 and a discharge circuit 5, the discharge circuit 5 being connected to a capacitor 7 of a DC circuit 4 for an electronic circuit 3 of a vehicle controller 2. 7
The contacts 10, 11,
12 and 13 open the control circuit command line 9 and AC power supply 8 to the vehicle controller 2 at the off position B;
A control circuit opener for a vehicle that closes a discharge circuit 5 and discharges the charge of a capacitor 7.