Brushed motor controller using back EMF for motor speed sensing, overload detection and pump shutdown, for bilge and other suitable pumps

A brushed motor controller comprising:

• one or more modules configured for providing one or more brushed motor control signals for controlling the operation of a brushed motor, including a signal for disconnecting the power applied to the brushed motor so that the brushed motor can provide a brushed motor signal containing information about a collective back EMF from all poles of the brushed motor, and configured for responding to the brushed motor signal, measuring the collective back EMF of the brushed motor, and providing the one or more brushed motor control signals for controlling the operation of the brushed motor.

A device, including a bilge pump, comprising:

• a brushed motor, responsive to one or more brushed motor control signals, and providing a brushed motor signal containing information about a collective back EMF from all poles of the brushed motor;
• and
• a brushed motor control having one or more modules configured for providing the one or more brushed motor control signals for controlling the operation of the brushed motor, including a signal for disconnecting the power applied to the brushed motor so that the brushed motor can provide the brushed motor signal, and configured for responding to the brushed motor signal, measuring the collective back EMF of the brushed motor, and providing the one or more brushed motor control signals for controlling the operation of the brushed motor.

A computer-readable storage medium having computer-executable components encoded with instructions that, when executed by a computer, perform:

• providing one or more brushed motor control signals for controlling the operation of a brushed motor, including a signal for disconnecting the power applied to the brushed motor so that the brushed motor can provide a brushed motor signal containing information about a collective back EMF from all poles of the brushed motor;
• and responding to the brushed motor signal, measuring the collective back EMF of the brushed motor, and providing the one or more brushed motor control signals for controlling the operation of the brushed motor.

Apparatus comprising:

• means for providing one or more brushed motor control signals for controlling the operation of a brushed motor, including a signal for disconnecting the power applied to the brushed motor so that the brushed motor can provide a brushed motor signal containing information about a collective back EMF from all poles of the brushed motor;
• and
• means for responding to the brushed motor signal, measuring the collective back EMF of the brushed motor, and providing the one or more brushed motor control signals for controlling the operation of the brushed motor.