Relay drive with voltage isolation

Patent metadata

Field	Value
Publication number	US-9847725-B2
Application number	US-201615137225-A
Country	US
Kind code	B2
Filing date	Apr 25, 2016
Priority date	Apr 25, 2016
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

Disclosed herein is a flyback system. The flyback system includes a tank circuit comprising a primary side and a secondary side. The flyback system also includes a switching device configured to pulse energy to the tank circuit. The energy is stored in a first side of the tank circuit when the switching device is on. The energy is transferred from the primary side to the secondary side when the switching device is off.

First claim

The invention claimed is:

1. A flyback system, comprising:
a tank circuit comprising a primary side and a secondary side; and
a switching device configured to pulse energy to the tank circuit,
wherein the energy is stored in a primary side of the tank circuit when the switching device is on, and
wherein the energy is transferred from the primary side to the secondary side when the switching device is off while the tank circuit is ringing,
wherein the switching device is configured to turn on and off at a 50% duty cycle.

2. The flyback system of claim 1 , comprising a first capacitance circuit configured to receive a voltage at an input from a power supply.

3. The flyback system of claim 1 , comprising a flyback integrated circuit configured to output a square wave.

4. The flyback system of claim 1 , comprising an over current protection circuit configured to manage an electrical short to the switching device.

5. The flyback system of claim 1 , comprising a rectifier and filter.

6. The flyback system of claim 1 , comprising a shunt regulator configured to open up while the flyback design is running if the flyback system is at a higher impedance then a toleration of the flyback system.

7. The flyback system of claim 6 , wherein the shunt regulator is to set to 28 volts.

8. The flyback system of claim 1 , wherein the tank circuit comprises a ratio potted isolation transformer with the primary in parallel with a capacitor to maximize the energy transferred to an output.

9. The flyback system of claim 8 , wherein flyback system comprises a greater than 88% efficiency to minimize excess power requirements for a power supply.

Assignees

• Pray Robert
• Skf Ab

Inventors

• Pray Robert

Classifications

• H02M3/33507 Primary

  with automatic control of the output voltage or current, e.g. flyback converters (H02M3/33561, H02M3/33569 take precedence) · CPC title

• H02M1/32

  Means for protecting converters other than automatic disconnection · CPC title

• H02M3/33561 Primary

  having more than one ouput with independent control · CPC title

• Y02B70/10

  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 · CPC title

• H02M3/33592

  having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer · CPC title