Supply unit and power supply are arranged

Supply unit and power supply are arranged

  • CN 102,056,829 B
  • Filed: 03/26/2009
  • Issued: 03/23/2016
  • Est. Priority Date: 04/07/2008
  • Status: Active Grant
First Claim
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1. a supply unit (1), it comprises the interface to load (2);

  • And this supply unit comprises at least one controlled solid-state switch (3), for powering between described load and supply unit;

    This supply unit comprises function unit (7), and it is mounted next with described at least one solid-state switch (3) of selected switching frequency (8) control;

    It is characterized in that, determine to make load noise have local minimum point and maximal point at the load noise at different switching frequency (8,9,10,11) places,And it is characterized in that, determine following switching frequency (8,9,10,11), at described switching frequency (8,9,10,11) when, noise level has local minimum point, and determines the local minimum (16,17 of the noise level corresponding with described switching frequency, 18,19);

    And it is characterized in that, based on determined noise level, in the limit set by the load according to solid-state switch, select the load noise level of its correspondence to be minimum switching frequency;

    AndDescribed function unit is mounted to carry out following operation;

    based on the determination of the watt loss at least one solid-state switch (3), limit the multiple switching frequencies (10 allowed,

         11), relatively more corresponding with allowed switching frequency load noise level (18,19), and based on described comparison, select the load noise level (18) corresponding with it for minimum switching frequency (10);

    During described power supply, repeatedly select switch frequency (8,9,10,11).

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