Multiple output DC-to-DC voltage converter apparatus

• US 4,480,298 A
• Filed: 01/25/1983
• Issued: 10/30/1984
• Est. Priority Date: 01/25/1983
• Status: Expired due to Fees

• Current Assignee: AEG Westinghouse Transportation Systems, Inc. (Alstom SA)
• Original Assignee: Westinghouse Electric Corporation (Paramount Global (f/k/a ViacomCBS Inc.))
• Inventors: Fry, Warren C.
• Primary Examiner(s): SHOOP JR, WILLIAM M
• Application Number:
  US06/461,042
• Time in Patent Office: 644 Days
• Field of Search: 307/11, 307/12, 307/31, 307/33, 363/27, 363/28, 363/37, 363/41, 363/84-86, 363/67, 363/96, 363/126, 363/128, 363/135
• US Class Current: 363/28
• CPC Class Codes: H02M 1/0032 Control circuits allowing low power mode operation, e.g. in standby mode
• CPC Class Codes: H02M 3/3155 with automatic control of the output voltage or current
• CPC Class Codes: H02M 3/33561 having more than one ouput with independent control
• CPC Class Codes: Y02B 70/10 Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

A voltage converter apparatus is provided to energize a first load and a second load from a power supply connected through an inverter and a coupling transformer, with the transformer having a first secondary winding energizing the first load with first voltage pulses having a variable width determined by the operational frequency of the inverter and having a second secondary winding energizing the second load with second voltage pulses having a variable width determined by a phase controlled switching apparatus responsive to one of the voltage and the current of the second voltage pulses.

Claims

1. In signal converter apparatus operative with an input power source for energizing a first load and a second load, the combination of

first switch means coupled with the input power source;

first signal supply means including a transformer having a primary winding connected to the first switch means and a plurality of secondary windings, with one of the secondary windings energizing the first load with a first output signal;

first control means operative with the first switch means and responsive to the first output signal for determining the actual voltage of the first output signal by controlling the frequency of the first output signal;

second signal supply means including second switch means coupled with another of the secondary windings and energizing the second load with a second output signal having said frequency; and

second control means operative with the second switch means and being responsive to a control signal determined by the first output signal and at least one of the current and voltage of the second output signal for determining the ON time phase relationship of the second switch means to control the second output signal.

2. The signal converter apparatus of claim 1,

with the second switch means including thyristor rectifiers providing said ON time phase relationship as a pulse width regulation of the second output signal in response to the initiation of the first output signal supplied to the first load.

3. The signal converter apparatus of claim 1,

with the first switch means regulating said actual voltage in response to the sensed voltage of the first output signal and with the second switch means regulating the actual voltage of the second output signal in response to the initiation of said control signal and in response to at least one of the sensed current and voltage of the second output signal.

4. The signal converter apparatus of claim 1,

with said one secondary winding energizing the first load through a first rectifier providing said first output signal, and

with the second control means being responsive to the provision of the first output signal to establish a predetermined time delay of the second output signal.

5. In voltage converter apparatus operative with an input voltage supply for energizing a first load and a second load, the combination of

first thyristor switch means coupled with the input voltage supply;

first rectifier and filter means connected through a first inductive coupling with the first thyristor switch means and providing an actual first output voltage to said first load;

first conduction control means responsive to the actual first output voltage and controlling the operation of the first thyristor switch means to regulate the frequancy of the actual first output voltage in accordance with a reference first output voltage;

second rectifier and filter means connected through a second inductive coupling with the first thyristor switch means and providing an actual second output voltage to said second load; and

second conduction control means responsive to the actual second output voltage and controlling the operation of the second rectifier and filter means to determine the provision time of the actual second output voltage in accordance with the provision time of the actual first output voltage.

6. In voltage converter apparatus operative with an input voltage supply for energizing a first load and a second load, the combination of

first thyristor switch means coupled with the input voltage supply;

first rectifier and filter means connected through a first inductive coupling with the first thyristor switch means and providing a first output voltage to said first load;

first conduction control means responsive to the first output voltage and controlling the operation of the first thyristor switch means to regulate the actual first output voltage in accordance with a reference first output voltage;

second rectifier and filter means connected through a second inductive coupling with the first thyristor switch means and providing a second output voltage to said second load; and

second conduction control means responsive to the second output voltage and controlling the operation of the second rectifier and filter means to regulate the actual second output voltage in accordance with a reference second output voltage;

with the second conduction control means being responsive to the frequency of the first output voltage for determining the frequency of the second output voltage.

7. In voltage converter apparatus operative with an input voltage supply for energizing a first load and a second load, the combination of

first thyristor switch means coupled with the input voltage supply;

first rectifier and filter means connected through a first inductive coupling with the first thyristor switch means and providing a first output voltage to said first load;

first conduction control means responsive to the first output voltage and controlling the operation of the first thyristor switch means to regulate the actual first output voltage in accordance with a reference first output voltage;

second rectifier and filter means connected through a second inductive coupling with the first thyristor switch means and providing a second output voltage to said second load; and

second conduction control means responsive to the second output voltage and controlling the operation of the second rectifier and filter means to regulate the actual second output voltage in accordance with a reference second output voltage;

with the second rectifier and filter means including thyristor devices and the second conduction control means being responsive to the first output voltage to control the operational phase of the latter thyristor devices for regulating the actual second output voltage.