System and method for controlling a motor at a constant rotations per minute (RPM)
A cleaning system including a motor configured to provide rotational energy to an impeller, a current sensor configured to sense current provided to the moto, and a controller having an electronic processor. The controller is configured to receive, from the current sensor, a current signal indicative of the current provided to the motor, filter the current signal to produce a filtered current signal, and control the motor based on the filtered current signal.
1. A cleaning system comprising:
a motor configured to provide rotational energy to an impeller;
a current sensor configured to sense current provided to the motor; and
a controller having an electronic processor, the controller configured to
receive, from the current sensor, a current signal indicative of the current provided to the motor,
filter the current signal to produce a filtered current signal, and
control the motor based on the filtered current signal,
wherein the controller controls the motor to operate at a first substantially constant rotations per minute when the current signal is less than a predetermined current threshold, and to operate at a second substantially constant rotations per minute when the current signal is greater than the predetermined current threshold.
2. The cleaning system of claim 1 , wherein the controller controls the motor further based on a gain value.
3. The cleaning system of claim 2 , wherein the gain value is a predetermined value.
4. The cleaning system of claim 1 , wherein the controller controls the motor based on a first gain value when the current signal is less than the predetermined current threshold, and a second gain value when the current signal is greater than the predetermined current threshold.
5. The cleaning system of claim 1 , wherein the controller controls the motor further based on the current compared to an unladen current.
6. The cleaning system of claim 5 , wherein the unladen current is a predetermined value.
7. The cleaning system of claim 1 , wherein the controller controls the motor to operate a substantially constant rotations per minute (RPM).
8. The cleaning system of claim 1 , wherein the controller controls the motor via a pulse-width modulated (PWM) signal.
9. The cleaning system of claim 1 , further comprising a battery configured to supply power to the motor.
10. The cleaning system of claim 9 , wherein the battery is a rechargeable battery pack.
11. The cleaning system of claim 9 , wherein the controller controls the motor independent of a voltage of the battery.
12. A method of controlling a cleaning system including a motor configured to provide rotational energy to an impeller, the method comprising:
sensing, via a current sensor, a current provided to the motor;
receiving, via a controller, a current signal indicative of the current from the current sensor;
filtering, via the controller, the current signal to produce a filtered current signal;
controlling, via the controller, the motor based on the filtered current signal; and
operating the motor at a first substantially constant rotations per minute when the current signal is less than a predetermined current threshold, and operating the motor at a second substantially constant rotations per minute when the current signal is greater than the predetermined current threshold.
13. The method of claim 12 , wherein the motor is further controlled based on a gain value.
14. The method of claim 13 , wherein the gain value is a predetermined value.
15. The method of claim 14 , further comprising controlling the motor based on a first gain value when the current signal is less than the predetermined current threshold, and a second gain value when the current signal is greater than the predetermined current threshold.
16. The method of claim 12 , wherein the motor is further controlled based on the current compared to an unladen current.
17. The method of claim 16 , wherein the unladen current is a predetermined value.
18. The method of claim 12 , wherein the motor is operated at a substantially constant rotations per minute (RPM).
19. A cleaning system comprising:
a motor configured to provide rotational energy to an impeller;
a current sensor configured to sense current provided to the motor; and
a controller having an electronic processor, the controller configured to
receive, from the current sensor, a current signal indicative of the current provided to the motor,
filter the current signal to produce a filtered current signal, and
control the motor based on the filtered current signal,
wherein the controller controls the motor based on a first gain value when the current signal is less than a predetermined current threshold, and a second gain value when the current signal is greater than the predetermined current threshold.