Radio controlled speed controller with audible feedback signal

Details Radio controlled speed controller with audible feedback signal Radio controlled speed controller with audible feedback signal

1992-09-22

1993-06-01

Wysocki, Jonathan

Electricity: motive power systems

Supplied or controlled by space-transmitted electromagnetic...

446456, 318490, H02P 700

Patent

active

052163377

ABSTRACT:
A speed controller with an audible feedback signal capability includes a receiver line, first and second battery lines, and a motor line. A drive circuit is provided for switching between an ON state coupling the first battery line to the motor line and an OFF state decoupling the first battery line from the motor line. Microprocessor circuitry for switches the drive circuit between the ON state and the OFF state according to setpoint information received by the control circuit from a receiver connected to the receiver line. The microprocessor circuitry is programmed to produce an audible feedback signal without a conventional acoustical transducer by cycling the drive circuit between the ON state and the OFF state at an audible rate for a controlled period of time at a duty ratio sufficiently small to avoid normal motor operation so that current flowing from the battery during the ON state causes audibly discernible mechanical vibration of at least one of the drive circuit, battery componentry connected to the first and second battery lines, and motor componentry connected to the motor line. The microprocessor circuitry may also turn a brake circuit on in order to insure a path for current to flow apart from the motor. In line with the above, a method of producing an audible signal for speed controller feedback purposes includes the step of providing a speed controller having a drive circuit as just described. The method proceeds by cycling the drive circuit between the ON state and the OFF state at an audible rate for a controlled period of time at a sufficiently small duty ratio.

REFERENCES:
patent: 4160253 (1979-07-01), Mabuchi et al.
patent: 4189706 (1980-02-01), Knox
patent: 4360808 (1982-11-01), Smith, III et al.
patent: 4413253 (1983-11-01), Hofer et al.
patent: 4584504 (1986-04-01), Lee et al.
patent: 4946415 (1990-08-01), Huang
patent: 4964331 (1990-10-01), Halery et al.
patent: 5113427 (1992-05-01), Ryoichi et al.
patent: 5136452 (1992-08-01), Orton

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