US 6,307,766 B1Granted

Contactless power system

AssigneeBayside Controls, Inc.

InventorsJoseph Ross, Alan Feinstein, Jack Zhu

Life of this patent

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Abstract

A contactless power supply device having a stationary unit and a movable unit that moves linearly in relation to the stationary unit. The stationary unit comprises a primary conductor having a power supply for supplying high frequency alternating current, at least one wire extending from the power supply along the stationary unit for carrying the current, and three switches arranged in parallel, each switch alternating its closing with the other switches to create a three phase alternating current. There is a secondary conductor disposed on the movable unit and arranged coaxially with the wire. The secondary conductor comprises a toroidal core surrounding the wire, and a three phase motor connected to the core and powered via induction from the power supply to slide the movable unit relative to the stationary unit. There are three switches connected in parallel between the motor and second controller, a plurality of Hall devices arranged in the secondary conductor for sending signals to communicate the status of the power to the first and second controllers, and a device for keeping the primary conductor and secondary conductor synchronous. The switches serially open and close to transfer alternating current in three phases from the amplifier to the motor.

Claims10

Dependent claims

A contactless power supply device having a stationary unit and a movable unit that moves linearly in relation to the stationary unit, comprising:

a primary conductor disposed on the stationary unit and comprising:
(a) a power supply comprising an amplifier for supplying high frequency alternating current;
(b) a plurality of wires extending from the power supply along the stationary unit for carrying said current;
(c) three switches arranged on said wires in parallel with each other, each switch alternating closing with said other switches to create a three phase alternating current;
(d) a first controller connected to said power supply for controlling the operation of the power supply;
a secondary conductor disposed on the movable unit and arranged for movement coaxially with said wires, said secondary conductor comprising:
(a) a toroidal core surrounding said wires;
(b) a three phase motor connected to said core and powered via induction from said power supply to slide the movable unit relative to the stationary unit;
(c) a second controller connected to said motor for controlling the operation of said motor;
(d) three switches connected in parallel between said motor and said second controller;
(e) a Hall sensor arranged on said secondary conductor for sending signals to communicate with said first and second controllers;
and
a device for keeping the primary conductor and secondary conductor synchronous;
wherein said switches serially open and close to transfer alternating current in three phases from said amplifier to said motor.

11 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/721,016Filed 22 Nov 2000
Granted: 23 Oct 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H02J 50/10
Circuit arrangements or systems for wireless supply or distribution of electric power: using inductive coupling
H02M 5/225
Using discharge tubes with control electrode or semiconductor devices with control electrode: comprising two stages of AC-AC conversion, e.g.…
H02J 50/005
Circuit arrangements or systems for wireless supply or distribution of electric power: mechanical details of housing or structure aiming to…
H02J
Power supply and charging