Patent ID: 11863103
Assignee: LUTRON TECHNOLOGY COMPANY LLC
Field: Civil engineering (Other fields)
Classification: CPC E  H  Y | IPC E  H

Claim 0:
1. A motor drive unit for driving a motor of a motorized window treatment, the motor drive unit comprising:
a motor drive circuit configured to control power delivered to the motor;
a rotational sensing circuit configured to generate a sensor signal that indicates rotation of the motor;
a control circuit configured to generate a drive signal for controlling the motor drive circuit to control the power delivered to the motor, the control circuit configured to detect a stall condition of the motor, and to control the motor drive circuit to stop driving the motor after a first period of time from detecting the stall condition; and
a stall prevention circuit configured to detect the stall condition by determining that the rotational sensing circuit is not generating the sensor signal while the control circuit is generating the drive signal to rotate the motor, the stall protection circuit configured to control the motor drive circuit to stop driving the motor after a second period of time from detecting the stall condition, the second period of time longer than the first period of time.