JP2016019417A5

JP2016019417A5 -

Info

Publication number: JP2016019417A5
Application number: JP2014142399A
Authority: JP
Filing date: 2014-07-10
Publication date: 2016-06-02
Anticipated expiration: 2034-07-10

Claims

A motor driving device for driving a motor,
A control unit for generating a control signal for driving the motor, and encoding the generated control signal into an error correction code;
An encoded output unit for transmitting the encoded control signal;
An analog voltage measurement unit that measures the analog voltage value of the monitor signal input to the analog voltage input terminal;
A control device comprising:
A transmission error detection circuit that receives an encoded control signal output from the encoding output unit, decodes the control signal, and detects an error included in the encoded control signal;
A resistance value corresponding to the temperature of the temperature measurement point is indicated, and a resistance temperature detector having one end connected to the analog input terminal,
A monitor signal generation circuit for generating a voltage for transmitting an error detection to the control device at a node connected to the analog voltage input terminal when the transmission error detection circuit detects an error;
A driver interface having a motor driver for driving the motor according to the control signal decoded by the transmission error detection circuit;
Current supply means for causing a current to flow through the resistance temperature detector and generating a voltage corresponding to a resistance value of the resistance temperature detector at the analog voltage input terminal;
A motor drive device comprising:

The analog voltage measuring unit is within a measurable voltage range,
A normal temperature voltage range indicating that the temperature of the temperature measurement point is a normal temperature range; and
A temperature abnormality warning voltage range indicating that the temperature of the temperature measurement point is below or above the normal temperature range; and
A wiring fault voltage range indicating a short circuit fault or an open fault of the wiring connected to the analog input terminal;
The monitor signal generation circuit applies a voltage in an error detection voltage range not included in any of the normal temperature voltage range, the temperature abnormality warning voltage range, and the wiring failure voltage range to the analog voltage input terminal. The motor drive device according to claim 1, wherein error detection is transmitted to the control device.

The motor driving apparatus according to claim 1, wherein the control device is a single microcontroller.

The transmission error detection circuit outputs a control signal for performing a predetermined safe operation to the motor driver when an error included in the encoded control signal is detected. The motor drive device according to any one of 1 to 3 .

The driver interface further includes a notification unit for reporting when the transmission error detection circuit detects an error included in the encoded control signal,
When the analog voltage measurement unit measures a voltage value in a temperature abnormality warning voltage range and / or a wiring failure voltage range, the control unit generates a control signal including a predetermined error in the encoding output unit. The motor drive device according to any one of claims 1 to 4 , wherein

When the transmission error detection circuit has not detected an error, the voltage between the first constant potential and the second constant potential is divided by the resistance temperature detector and the first fixed resistance element having a predetermined resistance value. the voltage obtained by the motor driving device according to any one of claims 1 to 5, characterized in that applied to the analog voltage input terminal.

The monitor signal generation circuit includes:
A second fixed resistance element;
When the transmission error detection circuit detects an error, it has an analog switch that is connected and connects the second fixed resistance element in parallel with the resistance temperature detector,
When the transmission error detection circuit detects an error, the voltage between the first constant potential and the second constant potential is paralleled by the first fixed resistance, the temperature measuring resistance, and the second fixed resistance element. The motor driving apparatus according to claim 6 , wherein a voltage in an error detection voltage range is applied to the analog voltage input terminal by dividing the voltage with a combined resistor.

The monitor signal generation circuit includes:
A second fixed resistance element;
An analog switch that is in an open state and connects the second fixed resistance element in series with the resistance temperature detector when the transmission error detection circuit detects an error;
When the transmission error detection circuit detects an error, the voltage between the first constant potential and the second constant potential is set in series by the first fixed resistance, the temperature measuring resistance, and the second fixed resistance element. The motor driving apparatus according to claim 6 , wherein a voltage in an error detection voltage range is applied to the analog voltage input terminal by dividing the voltage with a combined resistor.