Motor controller for electric blower motors
First Claim
1. A motor controller for an electric motor configured to drive a blower to generate an airflow, said motor controller comprising:
- a memory configured to store a single speed-to-airflow ratio associated with an airflow restriction on the blower; and
a processor coupled to said memory and configured to;
receive a command for a calibrating airflow;
operate the electric motor in a constant airflow mode to generate the calibrating airflow at a calibrating speed;
write the calibrating speed and the calibrating airflow to said memory as the single speed-to-airflow ratio;
receive a first command for a first objective airflow;
compute a first objective speed based on the single speed-to-airflow ratio and the first objective airflow;
operate the electric motor at the first objective speed to generate a first output airflow;
receive a second command for a second objective airflow;
compute a second objective speed based on the single speed-to-airflow ratio and the second objective airflow; and
operate the electric motor at the second objective speed to generate a second output airflow.
1 Assignment
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Accused Products
Abstract
A motor controller for an electric motor is provided. The electric motor is configured to drive a blower to generate an airflow. The motor controller includes a memory and a processor coupled thereto. The memory is configured to store a speed-to-airflow ratio associated with an airflow restriction on the blower. The processor is configured to receive a command for a calibrating airflow and operate the electric motor in a constant airflow mode to generate the calibrating airflow at a calibrating speed. The processor is further configured to write the calibrating speed and the calibrating airflow to the memory as the speed-to-airflow ratio.
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Citations
18 Claims
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1. A motor controller for an electric motor configured to drive a blower to generate an airflow, said motor controller comprising:
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a memory configured to store a single speed-to-airflow ratio associated with an airflow restriction on the blower; and a processor coupled to said memory and configured to; receive a command for a calibrating airflow; operate the electric motor in a constant airflow mode to generate the calibrating airflow at a calibrating speed; write the calibrating speed and the calibrating airflow to said memory as the single speed-to-airflow ratio; receive a first command for a first objective airflow; compute a first objective speed based on the single speed-to-airflow ratio and the first objective airflow; operate the electric motor at the first objective speed to generate a first output airflow; receive a second command for a second objective airflow; compute a second objective speed based on the single speed-to-airflow ratio and the second objective airflow; and operate the electric motor at the second objective speed to generate a second output airflow. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of operating an electric motor configured to drive a blower to generate an airflow, said method comprising:
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operating the electric motor at a calibrating speed to drive the blower to generate a calibrating airflow; storing the calibrating speed and the calibrating airflow in a memory as a single speed-to-airflow ratio; receiving a first command for a first objective airflow that is less than the calibrating airflow; computing first objective speed based on the single speed-to-airflow ratio and the first objective airflow; operating the electric motor at the first objective speed to drive the blower to generate a first output airflow; receiving a second command for a second objective airflow; computing a second objective speed based on the single speed-to-airflow ratio and the second objective airflow; and operating the electric motor at the second objective speed to generate a second output airflow. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A blower system, comprising:
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a blower configured to generate an airflow; an electric motor coupled to said blower and configured to drive said blower; and a motor controller coupled to said electric motor and configured to; receive a command for a calibrating airflow; determine a calibrating speed at which said electric motor turns to drive said blower to generate a calibrating airflow; operate the electric motor to drive said blower to generate the calibrating airflow at the calibrating speed; and store the calibrating speed and the calibrating airflow in a memory as a single speed-to-airflow ratio; compute a first objective speed based on the single speed-to-airflow ratio and a first commanded objective airflow; and operate said electric motor at the first objective speed to generate a first output airflow; compute a second objective speed based on the single speed-to-airflow ratio and a second commanded objective airflow; and operating the electric motor at the second objective speed to generate a second output airflow. - View Dependent Claims (15, 16, 17, 18)
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Specification