High-temperature brushless DC motor controller
First Claim
Patent Images
1. A motor controller for deployment in high temperature environments, comprising:
- a first half-bridge circuit comprising a first high-side switching element and a first low-side switching element;
a second half-bridge circuit comprising a second high-side switching element and a second low-side switching element;
a third half-bridge circuit comprising a third high-side switching element and a third;
low-side switching element;
wherein the controller is arranged to apply a pulse width modulation (PWM) scheme to switch the first half-bridge circuit, second half-bridge circuit, and third half-bridge circuit to power a motor; and
wherein the controller is configured to detect a stall condition of the motor in response to a voltage feedback signal; and
to stop commutation of the motor in response to detecting the stall condition; and
a charge pump to provide a control voltage to the controller that is greater than a rated power supply voltage (VCC) for operation of the high-side switching element.
4 Assignments
0 Petitions
Accused Products
Abstract
A motor control system for deployment in high temperature environments includes a controller; a first half-bridge circuit that includes a first high-side switching element and a first low-side switching element; a second half-bridge circuit that includes a second high-side switching element and a second low-side switching element; and a third half-bridge circuit that includes a third high-side switching element and a third; low-side switching element. The motor controller is arranged to apply a pulse width modulation (PWM) scheme to switch the first half-bridge circuit, second half-bridge circuit, and third half-bridge circuit to power a motor.
14 Citations
19 Claims
-
1. A motor controller for deployment in high temperature environments, comprising:
-
a first half-bridge circuit comprising a first high-side switching element and a first low-side switching element; a second half-bridge circuit comprising a second high-side switching element and a second low-side switching element; a third half-bridge circuit comprising a third high-side switching element and a third;
low-side switching element;wherein the controller is arranged to apply a pulse width modulation (PWM) scheme to switch the first half-bridge circuit, second half-bridge circuit, and third half-bridge circuit to power a motor; and wherein the controller is configured to detect a stall condition of the motor in response to a voltage feedback signal; and
to stop commutation of the motor in response to detecting the stall condition; anda charge pump to provide a control voltage to the controller that is greater than a rated power supply voltage (VCC) for operation of the high-side switching element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A tool comprising:
-
a housing; a protrusion pivotally attached to the housing; a motor and a controller disposed within the housing; and a coupling connected between the motor and protrusion; wherein the protrusion is pivoted away from the housing in response to operation of the motor; and wherein the controller comprises; a first half-bridge circuit comprising a first high-side switching element and a first low-side switching element; a second half-bridge circuit comprising a second high-side switching element and a second low-side switching element; and a third half-bridge circuit comprising a third high-side switching element and a third;
low-side switching element;wherein the controller is arranged to apply a pulse width modulation (PWM) scheme to switch the first half-bridge circuit, second half-bridge circuit, and third half-bridge circuit to power the motor; and wherein the controller is configured to detect a stall condition of the motor in response to a voltage feedback signal; and
to stop commutation of the motor in response to detecting the stall condition; anda charge pump to provide a control voltage to the controller that is greater than a rated power supply voltage (VCC) for operation of the high-side switching element. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
-
Specification