Method and device for frequency generation for a resonance converter

• US 9,343,987 B2
• Filed: 12/01/2014
• Issued: 05/17/2016
• Est. Priority Date: 11/29/2013
• Status: Active Grant

• Current Assignee: Valeo Siemens Eautomotive Germany GmbH
• Original Assignee: Siemens AG
• Inventors: Rupf, Stephan
• Primary Examiner(s): Pham, Emily P
• Application Number:
  US14/556,582
• Publication Number:
  US 20150155790A1
• Time in Patent Office: 533 Days
• US Class Current: 1/1
• CPC Class Codes: B60L 2210/10 DC to DC converters
• CPC Class Codes: B60L 2240/527 Voltage
• CPC Class Codes: B60L 2240/529 Current
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H02M 3/01 Resonant DC/DC converters
• CPC Class Codes: H02M 3/3376 with automatic control of output voltage or current
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

A method and an activation circuit for frequency generation for a resonance converter that is driven by a half bridge or a full bridge. An activation circuit with a controller excites a resonance circuit belonging to the resonance converter. The power, current or voltage of the resonance converter is controlled via the frequency. The controller activates a programmable variable clock generator via a first interface. The frequency dividers able to be programmed via a second interface create the operating frequency of the half bridge or full bridge by dividing the frequency of a clock generator into different duty cycles. The frequency of the clock generator amounts to a multiple of the bridge frequency, and the second clock generator and thereby the H-bridge frequency of the resonance converter is independent of the first clock generator which supplies the controller.

Claims

1. A method for frequency generation for a resonance converter driven by a half bridge or a full bridge, the method comprising:

providing an activation circuit with a controller and exciting a resonance circuit with the activation circuit, wherein a power, a current or a voltage of the resonance converter is controlled via the frequency;

operating the controller via a first clock generator and, via a first interface, controlling with the controller a frequency of a second clock generator that is operated independently of or asynchronously of the first clock generator;

generating with two frequency dividers a working frequency of the half bridge or full bridge by dividing a frequency of the second clock generator; and

via a second interface, controlling with the controller a divider ratio of the frequency dividers with which a dead time is generated;

wherein a frequency of the second clock generator amounts to a multiple of the bridge frequency.

2. The method according to claim 1, which comprises checking the frequency generated by the second clock generator via a feedback to the controller.

3. The method according to claim 1, which comprises feeding the frequency of the second clock generator back to the controller for checking.

4. An activation circuit with a controller for exciting a resonance circuit of a resonance converter driven by a half bridge or a full bridge, the activation circuit comprising:

a) a first clock generator for supplying a clock signal to the controller;

b) a second clock generator configured to be programmed via a first interface, a frequency of said second clock generator amounting to a multiple of a bridge frequency;

c) two frequency dividers for generating an operating frequency of the half bridge or full bridge by dividing the frequency of said second clock generator and for dead time generation;

d) wherein a divider ratio is controlled by said controller via a second interface.

5. The activation circuit according to claim 4, wherein said first interface is a parallel interface.