PWM rectifier circuit working principle

GW MB10F 0.8A 1000V rectifier bridge
Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin
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1. /></sub><!--Element not supported - Type: 9 Name: #document--></span>. <span lang="EN-US"><sub><v:shape id="_x0000_i1099" type="#_x0000_t75" o:ole= It contains the fundamental wave proportional to the amplitude and amplitude of the sinusoidal modulation wave, and the higher harmonics of the carrier frequency, but does not contain the lower harmonics. Due to the action of the input inductor L s on the AC side, the current ripple caused by the higher harmonics is filtered out, and the frequency of the sinusoidal modulation wave is controlled to be the same frequency as the Power Source, then the input current is /></sub><!--Element not supported - Type: 9 Name: #document--></span> can also be the same frequency sine wave as the power supply. <span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal"><span id="_x0000_i1101" type= "#_x0000_t75" o:ole= At the same time, two boost chopper circuits are composed of VT 2 , VD 4 , VD 1 , Ls and VT 3 , VD 1 , VD 4 , and Ls , respectively. Taking a circuit composed of VT 2 , VD 4 , VD 1 , and Ls as an example, when VT 2 is turned on, /></sub><!--Element not supported - Type: 9 Name: #document--></span>via <span lang="EN-US">VT<sub>2</sub></ Span>, <span lang="EN-US">VD<sub>4</sub></span> to <span lang="EN-US">Ls</span> energy storage; when <span lang= When "EN-US">VT<sub>2</sub></span> is turned off, the energy stored in <span lang="EN-US">Ls</span> is passed through <span lang="EN- US">VD<sub>1</sub></span>, <span lang="EN-US">VD<sub>4</sub></span> to DC side capacitor <span lang="EN -US">C</span> Charging, causing DC voltage <span lang="EN-US"><sub><v:shape id="_x0000_i1103" type="#_x0000_t75" o:ole= Above /></sub><!--Element not supported - Type: 9 Name: #document--></span> peak. When <span lang="EN-US"><sub><v:shape id="_x0000_i1105" type="#_x0000_t75" o:ole= When the VT 1 , VD 3 , VD 2 , Ls and VT 4 , VD 2 , VD 3 , Ls respectively form two step-up chopper circuits, the working principle and /></sub><!--Element not supported - Type: 9 Name: #document--></span> is similar. Since the voltage type <span lang="EN-US">PWM</span> rectifier circuit is a step-up rectifier circuit, its output DC voltage should be adjusted upward from the peak value of the AC voltage, and the low regulation will deteriorate the input characteristics or even work. </span></p><p class="MsoNormal"><span v:shapes="_x0000_s1246" alt=

1 PWM

/></sub><!--Element not supported - Type: 9 Name: #document--></span> Relative power supply voltage <span lang="EN-US"><sub><v:shape id= "_x0000_i1108" type="#_x0000_t75" o:ole= The phase is through the AC input voltage to the rectifier circuit /></sub><!--Element not supported - Type: 9 Name: #document--></span> controls to implement the adjustment. Figure <span lang="EN-US">5-47</span> gives the fundamental circuit equivalent circuit of the AC input circuit and the phasor diagram under various operating conditions. <span lang="EN-US"><sub><v:shape id="_x0000_i1110" type="#_x0000_t75" o:ole= AC Power Supply voltage /></sub><!--Element not supported - Type: 9 Name: #document--></span>, inductance <span lang="EN-US"><sub><v:shape id=" _x0000_i1113" type="#_x0000_t75" o:ole= Upper voltage /></sub><!--Element not supported - Type: 9 Name: #document--></span>, resistance <span lang="EN-US"><sub><v:shape id=" _x0000_i1115" type="#_x0000_t75" o:ole= Upper voltage /></sub><!--Element not supported - Type: 9 Name: #document--></span> and input current <span lang="EN-US"><sub><v:shape id= "_x0000_i1117" type="#_x0000_t75" o:ole= Fundamental phasor, /></sub><!--Element not supported - Type: 9 Name: #document--></span> is <span lang="EN-US"><sub><v:shape id="_x0000_i1119 " type="#_x0000_t75" o:ole= The phasor.

Lag /></sub><!--Element not supported - Type: 9 Name: #document--></span><span lang="EN-US"><sub><v:shape id=" _x0000_i1122" type="#_x0000_t75" o:ole= Corner to ensure /></sub><!--Element not supported - Type: 9 Name: #document--></span> and <span lang="EN-US"><sub><v:shape id="_x0000_i1124 " type="#_x0000_t75" o:ole= In phase, the power factor is 1 , and energy is sent from the AC side to the DC side.

/></sub><!--Element not supported - Type: 9 Name: #document--></span>Before <span lang="EN-US"><sub><v:shape id="_x0000_i1126 " type="#_x0000_t75" o:ole= one of /></sub><!--Element not supported - Type: 9 Name: #document--></span> corner to ensure <span lang="EN-US"><sub><v:shape id ="_x0000_i1128" type="#_x0000_t75" o:ole= versus /></sub><!--Element not supported - Type: 9 Name: #document--></span> is just the opposite phase, the power factor is also <span lang="EN-US">1</ Span>, but the energy returns from the DC side to the AC side. From the map (<i><span lang="EN-US">b</span></i>), (<i><span lang="EN-US">c</span></i> It can be seen that the <span lang="EN-US">PWM</span> rectifier circuit only needs to control <span lang="EN-US"><sub><v:shape id="_x0000_i1130" type="# _x0000_t75" o:ole= The phase can easily realize the bidirectional flow of energy, which is a necessary converter circuit scheme for the AC speed control system which needs regenerative braking function and wants to realize four-quadrant operation.

/></sub><!--Element not supported - Type: 9 Name: #document--></span>hysteresis <span lang="EN-US"><sub><v:shape id="_x0000_i1132 " type="#_x0000_t75" o:ole= One /></sub><!--Element not supported - Type: 9 Name: #document--></span> corner to ensure <span lang="EN-US"><sub><v:shape id ="_x0000_i1134" type="#_x0000_t75" o:ole= Advance /></sub><!--Element not supported - Type: 9 Name: #document--></span>o, the rectifier circuit sends reactive power to the AC power supply. This operating state circuit is called reactive power generator <span lang="EN-US">SVG</span> (<span lang="EN-US">Static Var Generator</span>), Reactive power compensation in the power system. <span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" align="left"><span id= "_x0000_i1136" type="#_x0000_t75" o:ole= Phase and amplitude can be achieved /></sub><!--Element not supported - Type: 9 Name: #document--></span> and <span lang="EN-US"><sub><v:shape id="_x0000_i1138 " type="#_x0000_t75" o:ole= Arbitrary phase /></sub><!--Element not supported - Type: 9 Name: #document--></span> Relationship. <span lang="EN-US"><o:p></o:p></span></span></p><p class="MsoNormal" align="left"><span lang= "EN-US">2.</span><span class="MsoNormal" align="left"><span lang="EN-US"><o:p></o:p></span> </p><p class="MsoNormal" align="center"><v:shape id="_x0000_s1248" type="#_x0000_t75"><v:imagedata src="images/image159.png" o:title= "548"></v:imagedata></v:shape><span v:shapes="_x0000_s1248" alt=


3 PWM

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