Electrically communtated motor with data communication device
First Claim
1. An electronically commutated motor (ECM) comprising:
- windings;
a power switch configured to provide pulse width modulated (PWM) power signals to the windings, wherein the power switch is configured to generate substantial electromagnetic noises during its switching operation;
an infrared transceiver configured to communicate with an external device using infrared signals and configured to convert electrical signals from and to infrared signals that carry data;
an electromagnetic shield configured to substantially shield the infrared transceiver from the electromagnetic noises from the power switch; and
a housing enclosing the windings, the power switch, and the infrared transceiver,wherein the electromagnetic shield comprises an electrically conductive case and an optical panel connected to the electrically conductive case, wherein the optical panel comprises an electrically conductive grid allowing transmission of infrared signals therethrough.
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Accused Products
Abstract
An electronically commutated motor (ECM) includes windings, a power switch, an infrared transceiver and an electromagnetic shield. The power switch is configured to provide pulse width modulated (PWM) power signals to the windings and to generate a substantial level of electromagnetic noises at PWM frequencies during its switching operation. The infrared transceiver is configured to communicate with an external device using infrared signals and convert electrical signals from and to infrared signals that carry data. The electromagnetic shield is configured to substantially shield the infrared transceiver from the electromagnetic noises of PWM frequencies from the power switch.
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Citations
19 Claims
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1. An electronically commutated motor (ECM) comprising:
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windings; a power switch configured to provide pulse width modulated (PWM) power signals to the windings, wherein the power switch is configured to generate substantial electromagnetic noises during its switching operation; an infrared transceiver configured to communicate with an external device using infrared signals and configured to convert electrical signals from and to infrared signals that carry data; an electromagnetic shield configured to substantially shield the infrared transceiver from the electromagnetic noises from the power switch; and a housing enclosing the windings, the power switch, and the infrared transceiver, wherein the electromagnetic shield comprises an electrically conductive case and an optical panel connected to the electrically conductive case, wherein the optical panel comprises an electrically conductive grid allowing transmission of infrared signals therethrough. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of updating data in an electrically commutated motor, the method comprising:
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providing an electronically commutated motor which comprises windings, a microprocessor, an infrared transceiver, and an electromagnetic shield covering the infrared transceiver; supplying pulse width modulated (PWM) power signals to the windings, thereby operating the motor; receiving, at the infrared transceiver, infrared signals from an external device external to the motor; converting, at the infrared transceiver, the received infrared signals to electrical signals while supplying the PWM power signals to the windings, wherein the electromagnetic shield substantially shield the infrared transceiver from electromagnetic noises caused by the PWM power signals; and transmitting the electrical signals to the microprocessor, wherein the infrared transceiver comprises an electrical circuit and an optoelectric sensor, wherein the electromagnetic shield substantially entirely covers both the electrical circuit and the optoelectric sensor. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification