Diagnostic apparatus
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsTaro Kishibe, Hideyuki Kishida, Yusuke Shimogaki
Life of this patent
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Abstract
A diagnostic apparatus includes a control device and an extension device connectable to the control device. The control device includes one or more cutoff blocks that switch between allowing and cutting off power supply to a load, a first diagnostic pulse generator that generates a diagnostic signal indicating that the power to the load is to be cut off, a first cutoff diagnosing device that detects a supply voltage to the load, and an extension device detector that determines whether the extension device is connected to the control device. The extension device includes a second diagnostic pulse generator that generates a diagnostic signal, and a second cutoff diagnosing device that detects a supply voltage to the load.
Claims6
A diagnostic apparatus, comprising:
- a control device;
- and
- an extension device connectable to the control device, wherein the control device includes:
- a cutoff block that switches between allowing and cutting off power supply to a load;
- a first diagnostic pulse generator that generates a first diagnostic signal indicating that the power supply to the load is to be cut off;
- a first cutoff diagnosing device that detects a supply voltage to the load;
- and
- an extension device detector that determines whether the extension device is connected to the control device,
- the extension device includes:
- a second diagnostic pulse generator that generates a second diagnostic signal;
- and
- a second cutoff diagnosing device that detects a supply voltage to the load,
- when the extension device detector has determined that the extension device is not connected to the control device,
- the first diagnostic pulse generator outputs the first diagnostic signal to the cutoff block,
- the cutoff block cuts off the power supply to the load in response to the first diagnostic signal output from the first diagnostic pulse generator, and
- the first cutoff diagnosing device diagnoses whether there is a failure in the cutoff block based on the supply voltage to the load that is detected, and
- when the extension device detector has determined that the extension device is connected to the control device,
- the second diagnostic pulse generator outputs the second diagnostic signal to the cutoff block,
- the cutoff block cuts off the power supply to the load in response to the second diagnostic signal output from the second diagnostic pulse generator, and
- the second cutoff diagnosing device diagnoses whether there is a failure in the cutoff block based on the supply voltage to the load that is detected.
A diagnostic apparatus, comprising:
- a motor controlling device;
- and
- an extension device connectable to the motor controlling device, wherein the motor controlling device includes:
- an inverter circuit that controls a voltage to be applied to a motor through Pulse Width Modulation (PWM) control;
- a driving circuit that drives the inverter circuit;
- a cutoff circuit that switches between allowing and cutting off power supply to the driving circuit;
- a first diagnostic pulse generator that generates a first diagnostic signal indicating that the power supply to the driving circuit is to be cut off;
- a first cutoff diagnosing device that detects a supply voltage to the driving circuit;
- and
- an extension device detector that determines whether the extension device is connected to the motor controlling device,
- the extension device includes:
- a second diagnostic pulse generator that generates a second diagnostic signal;
- and
- a second cutoff diagnosing device that detects a supply voltage to the driving circuit,
- when the extension device detector has determined that the extension device is not connected to the motor controlling device,
- the first diagnostic pulse generator outputs the first diagnostic signal to the cutoff circuit,
- the cutoff circuit cuts off the power supply to the driving circuit in response to the first diagnostic signal output from the first diagnostic pulse generator, and
- the first cutoff diagnosing device diagnoses whether there is a failure in the cutoff circuit based on the supply voltage to the driving circuit that is detected, and
- when the extension device detector has determined that the extension device is connected to the motor controlling device,
- the second diagnostic pulse generator outputs the second diagnostic signal to the cutoff circuit,
- the cutoff circuit cuts off the power supply to the driving circuit in response to the second diagnostic signal output from the second diagnostic pulse generator, and
- the second cutoff diagnosing device diagnoses whether there is a failure in the cutoff circuit based on the supply voltage to the driving circuit that is detected.
Dependencies are inferred from the claim text.