The alternating current chopper main circuit comprises a chopper switch element assembly (3), two inductance coils (L1 and L2), two diodes (D1 and D2), and a capacitor (C).

The chopper preferably includes two sets of intersecting chopper blades that rotate in opposing synchronized motion in a zone of fluidized flow of product caused by the agitator assembly.

The counter electromotive force is amplified by a waveform shaping circuit for chopper amplification (118) with a predetermined cycle and a chopper width.

A shroud above the chopper can be used to redirect product sprayed upwardly from the chopper blades back laterally into the zone of fluidized flow of product.

The chopper is moveably coupled to the header such that the chopper moves between first and second positions to vary the angle at which crops are cut.

A battery (26) is connected to the capacitor (22) via a chopper (24).

The step-up chopper circuit (12) functions as a power factor correction circuit.

This problem is met by inhibiting the occurrence of and "off" actuation control signal to the SCR chopper circuit for a given period of time before and a given period of time after and "on" actuation control signal to the other chopper circuit.

An output pulley (16) is also rotatable about the fixed shaft and drives the chopper.

The motor (12) is supplied with current through a transistor chopper (28) whose on/off operation is controlled, and the motor (18) is supplied with current through a thyristor chopper (32).

The line power module (16) includes a chopper module (21) that is provided with a non-filtered high efficiency converter circuit that allows the chopper module (21) to generate the power and current required by the driven device (12).

A chopper can be combined with the circuit of Villard.

brake chopper control board (ABRC) with option +D150

A test measurement was performed on a pilot dehumidifier.

To reduce the voltage at the destination (130) a step down chopper (118) is used in one embodiment.