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Microwave timer and power regulator structure and principles

Time£º2014-05-03 07:49:06  Source£ºNetwork  Author£ºUnknown  Clicks£º1313
  

Ordinary microwave oven are generally used timer and power regulation ( control ) is driven by the same motor assembly form , referred to as regular power conditioner . Timer mainly by micro synchronous motor, reduction gear assembly and timing linkage switches and other components. Because of the interlocking switch in series with the power supply circuit of the microwave oven , and therefore most of the timer to start the power switch also serves , of course, a separate microwave except the start switch . When the operator toggle button timer setting , timer switch is turned on , a microwave energized and begin to work, while the timer motor rotation . When the timer time is reached, the switch is turned off, the microwave oven stops operating. Many time switch will disconnect uttered crisp tone to remind people heated completed.8wwservice manual download site
  Also known as fire power regulator regulator, which is actually a time switch function is periodically switched on and off continuously during the microwave oven magnetron power working magnetron regular work intermittently , i.e., work time and rest time there is a certain ratio between the change in this ratio , it makes the whole heating in a microwave oven magnetron period of working time can be changed accordingly, and thus play a role in regulating the microwave output power . Power regulator is driven by the same motor used for the timer .8wwservice manual download site
  When the actual work , when set power value , power regulator will control the magnetron working for some time and then rest for some time , and then the cycle of this process a certain period until the end of the microwave oven work . It is assumed that the magnetron - operating within a cycle time of t1, pause time t2, then one cycle T = t1 + t2, as shown in Figure 6 . From Figure 6 it can be clearly seen in the power regulator to control the microwave output power mode . Cycle T values ​​very particular point of view to consider taking shorter from heating good, but too short to allow frequent movement power adjustment switch , the impact of the magnetron job stability and service life. Typically mechanical power regulator T have taken about 30s, proved ideal. When T = 30s, the time t1 when the magnetron disposed respectively 6,12,15,24,30 s, then the corresponding output power of the microwave power 6s of heat , which is 20% of the furnace of the nominal power of the microwave output power Po , also known as the warm fire gear. Corresponding 12s for thawing power (40% Po, also known as low -power or low- fire ) , for the corresponding 15s power (50% Po, also known as the fire ) , corresponding to the 24s for high -power (80% Po, also known as high fire ) , corresponding to the 30s for high power (100% Po, also known as high-fire or full power ) . Most ordinary microwave oven has this 5-speed Power ( fire ) adjustable stop , of course, each block of the power settings may vary. There are more minority microwave power block , block up as much as 8 to 12 , in order to better adapt to the needs of different cooking and thawing foods .