Sequence Controls Inc.

Other

William Harry Kemp

Donald E Morgan

Dale A Van Spengen

An induction motor system comprising an induction motor, equipped with a heat recovery and water pumping apparatus and an apparatus for controlling the electrical efficiency and resulting heat generation of the induction motor. The motor is adapted to be coupled to an AC source for supplying an AC signal. The controlling apparatus includes a switching device, user controls and optional inputs. The switching device is connected in series with the motor and is operative in either a high impedance state wherein significant current flow through the motor is prevented or a low impedance state wherein current flow through the motor is substantially undisturbed. The user controls provide motor operational input signals. The optional inputs provide setpoint and sensed water temperature input signals. The controller means receives the motor operational setpoint and sensed water temperature input signals from the user controls and optional inputs, and switches the switching device between its low and high impedance states in a predetermined sequence for inducing a phase delay in the AC signal.

Apparatus for controlling heat generation and recovery in an induction motor

An apparatus operable in a wet environment for detecting the presence or absence of water in a non-conductive vessel, by measuring changes in dielectric constant and detecting the temperature of water in same vessel. A conductive element coupled to a sensing and switching means, transmits data to the controller, resulting from a change of dielectric constant at the conductive element. A temperature sensor detects and transmits temperature signals to the controller. A controller means receives data, from the dielectric constant sensor means and temperature data from the temperature sensor. Includes a coupling means which transmits data from the controller to an external device. The isolation means electrically isolates the conductive element and temperature sensor means from the water contained in a non-conductive vessel.

Apparatus for detection of water level and temperature in a bathing appliance

An induction motor system operable in a wet environment comprises an induction motor and an apparatus for controlling the speed of the motor. The motor is adapted to be coupled to an AC source for supplying an AC signal. The motor includes a rotor having rotor laminations. The reflected rotor resistance over reflected rotor reactance ratio of the motor is adjusted to be greater than one. The controlling apparatus includes a switching device, user controls, controller means and isolation means. The switching device is connected in series with the motor and is operative in either a high impedance state wherein significant current flow through the motor is prevented or a low impedance state wherein current flow through the motor is substantially undisturbed. The user controls provide motor speed input signals. The controller means receives the motor speed input signals from the user controls, and switches the switching device between its low and high impedance states in a predetermined sequence for inducing a phase angle delay in the AC signal. The isolation means electrically isolates the controller means from the AC source and includes coupling means for optically coupling the switching device to the controller means.

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Clayton, CA, United States of America

William Harry Kemp