Motor driver fault protector
US6580590B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2001 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Dec 29, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/0833
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor driver high current protector includes a voltage source, a current sensor, a comparator, a switch, a delay circuit, and an inhibitor. The current sensor is configured to sense current passing through the motor driver and output a voltage responsive to the sensed current. The comparator has an output and is configured to generate a low voltage at its output while the output of the current sensor exceeds a first reference voltage. The switch has an input, an output, and a base. The base is activated by a low voltage at the output of the comparator to close the switch. Closing the switch provides electrical connection between the input and the output of the switch. The input of the switch is connected to the voltage source. The delay circuit is connected to the output of the switch and is configured to delay the voltage at the output of the switch while the switch is open. The delay circuit may include a resistor and a capacitor each connected to the output of the switch. The inhibitor is configured to inhibit the motor driver while the output of the switch exceeds a second reference voltage. The inhibitor may include first and second inhibitor comparators, each of the inhibit…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.