Cascaded or combined, diverse conversions in which the frequency or phase or combined conversion is without intermediate conversion to d.c.

Combined phase and frequency conversion (i.e., ph1f1-ph2f2)

By electron tube converter

By saturable reactor converter

By semiconductor device converter

Current and frequency (e.g., f1-f2-d.c.)

Current and phase (e.g., d.c.-ph1-ph2)

Phase 1 to phase 2 to d.c.

Single phase to polyphase to d.c.

With dynamic rectifier in phase 2 to d.c. stage (e.g., commutator type)

With interphase transformer

Including plural anode/single cathode device

Current conversion

Current conversion

By circuit interrupter type

Rotating

Inverter (i.e., d.c.-a.c.)

Rectifier (i.e., a.c.-d.c.)

Vibrating

Constant current to constant voltage or vice versa

Cryogenic

Cryogenic

Including d.c.- a.c.- d.c. converter

Bridge type

Encased in plug housing

Having plural converters for single conversion

Including plural anodes and single cathode (e.g., vapor arc device)

Plural inverters

Master-slave

Plural rectifiers

In parallel

Including semiconductor device

In series (e.g., series scr's, bridge circuits, etc.)

Including an a.c.-d.c.-a.c. converter

By electron tube rectifier and inverter

By semiconductor rectifier and inverter

For change of phase (e.g., number of phases)

For transfer of power via a high voltage d.c. link (i.e., hvdc transmission system)

Including automatic or integral protection means

For high voltage d.c. transmission systems

For inverters

Thyristor inverter

Bridge type

Transistor inverter

Bridge type

Having current protection (e.g., over current, short, etc.)

Including short protection across a series-connected pair of transistors (e.g., shoot-through protection, etc.)

Having voltage protection

Double-ended type

Having current protection

Having voltage protection

Single-ended type

Having current protection

Having voltage protection

Transient protection (e.g., snubber, etc.)

For rectifiers

Semiconductor type

Thyristor

Including d.c.-a.c.-d.c. converter

Having electron-tube inverter

Double-ended type (i.e., push-pull)

Single-ended type

Having thyristor inverter (e.g., scr, etc.)

With automatic control of the magnitude of output voltage or current

Having transistorized inverter

Bridge type

Double-ended (i.e., push-pull), self-oscillating type

With automatic control of the magnitude of output voltage or current

Double-ended (i.e., push-pull), separately-driven type

With automatic control of the magnitude of output voltage or current

Utilizing pulse-width modulation

Single-ended, self-oscillating type

With automatic control of the magnitude of output voltage or current

Single-ended, separately-driven type

With automatic control of the magnitude of output voltage or current

For flyback-type converter

Having digital logic

Having feedback isolation (e.g., optoisolator, transformer coupled, etc.)

Having feedback winding inductively coupled to inverter inductive device (e.g., tertiary winding, etc.)

Having output current feedback

Having synchronous rectifier

Utilizing pulse-width modulation

For forward-type converter

Having digital logic

Having feedback isolation (e.g., optoisolator, transformer coupled, etc.)

Having feedback winding inductively coupled to inverter inductive device (e.g., tertiary winding, etc.)

Having output current feedback

Having synchronous rectifier

Utilizing pulse-width modulation

Having particular pulse-width modulation circuit

For resonant-type converter

Having particular zero-switching control circuit (e.g., for quasi-resonant converter, etc.)

Rotary-commutator-type inverter

Vibrator-type inverter

Integrated circuit

Using dynamoelectric machine converter

Plural collector type

Having auxiliary motor drive

Having plural field windings

Using electronic tube converter

In inverter systems

With discharge control means (e.g., grid)

Grid-like electrode

In rectifier systems

With discharge control means (e.g., grid)

D.c. bias control

Particular waveform grid excitation

Phase angle control

With retarding or delaying control means

With cathode element control

With gap in open atmosphere

Using impedance-type converter

Using semiconductor-type converter

In chopper converter systems

In rectifier systems

Diode

Thyristor

Plural phase to d.c.

With magnetic control means

Transistor

In thyristor inverter systems

Bridge type

D.c. to plural phase

With commutation means

Double ended (i.e., push-pull) type

In transistor inverter systems

Bridge type

Double ended (i.e., push-pull) type

Separately driven

With auxiliary bucking or boosting emf

With condition responsive means to control the output voltage or current

Cooperating separate sensing and control means

For inverter

With electron tube or valve control means in the line circuit

With thyristor control means in the line circuit

With transistor control means in the line circuit

For bridge-type inverter

For rectifier system

With electron tube or valve control means in the line circuit

With inductive control means in the line circuit

Saturable reactor (e.g., magnetic amplifier)

In plural phase to d.c. system

With plural control windings

With thyristor control means in the line circuit

External to rectifier (e.g., pre or post regulation)

For full wave rectifier with at least 1 three electrode device

For plural phase to d.c. rectifier

With transistor control means in the line circuit

Including plural sensing or control means

By rectifier

With electron tube or valve as control means in the line circuit

With inductive control means in the line circuit

With transistor as control means in the line circuit

Including inductive integral sensing and control means (e.g., ferroresonant circuit)

Including integral sensing and control means for rectifier

With semiconductor conversion means

With conductive support mounting

Adapted for use with alternators

With cooling means

With interphase transformer

With manual control of the output voltage or current

With means to connect the input to diverse power sources

110/220 volts a.c. in, constant 110 volts d.c. out

With means to introduce or eliminate frequency components

In inverter systems

By pulse modulation technique (e.g., pwm, ppm, etc.)

Including notching

By step-wave, amplitude summation technique

In rectifier systems

Including means for reducing ripples from the output

With low pass l or lc filter

For semiconductor rectifier

With ripple responsive, automatic control

With means to selectively provide d.c. of either polarity

With starting arrangement

With voltage division by storage type impedance (i.e., v out)

With voltage multiplication means (i.e., v out > v in)

Including semiconductor means

For rectifying

Frequency conversion (f1-f2) without intermediate conversion to d.c.

By circuit interrupter converter

By electron tube converter

With discharge control means

Including plural anodes and single cathode device (e.g., vapor arc device)

Thyratron type

By induction-type converter

Dynamoelectric machine

Including induction motor

Motor generator type

Lc circuit

Transformer

Saturable core

By semiconductor converter

Thyristor type

Positive and negative groups

Including blanking or inhibiting means

Transistor type

By varactor

With automatic frequency control

With automatic voltage magnitude control

Miscellaneous

Phase conversion (ph1-ph2) without intermediate conversion to d.c.

By dynamoelectric machine converter

By electron tube converter

By induction-type converter

Transformer type

Stationary

With passive phase shift element

By passive phase shift elements

With automatic voltage magnitude or phase angle control