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- Table of contents
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User Manual
106 i Series / iX Series
5.6 DC-DC Power Converter
The DC-DC power converter, A3, is powered from the rectified AC input. The converter is a
PWM (pulse width modulated) full bridge type that uses IGBT‟s as the power switches. The
control logic supply for the DC-DC converter is derived from the auxiliary power supply so the
DC-DC converter does not start switching until after the auxiliary power supply has started up
and comes into regulation. This feature ensures a smooth start up.
The output of the DC converter is automatically selected for 250 VDC or 500 VDC output
depending on whether the low range output (135/150 Vac) or high range output (270/300 Vac) is
selected. The 250/500 VDC range selection is made by a relay that selects one of two taps on
the DC output transformer. The converter is fully protected with input current limit and
overvoltage protection. When the output of the DC converter is up and in regulation, the LED on
the input/output board will be lit. The LED can only be seen by looking directly down between the
large storage capacitors and the input/output board. (See Figure 5-3)
5.7 AC Control Logic
The main function of the control board, A4, is to generate the gate drive signals for the AC power
stage. This board also includes the circuit for the current limit and when two or three units are
operated in parallel, the load sharing circuit. (See Figure 5-6)
The signal from the oscillator is fed through a low pass filter circuit and sent to the reference
input of the error amplifier. The voltage output of the unit is differentially sensed and fed back to
the error amplifier thereby completing the control loop. The output of the error amplifier drives a
37.5 kHz pulse width modulator. The modulator output is sent to four gate drivers which drive
the IGBT‟s on the AC power board after going through opto couplers that provide the necessary
isolation.
- AC Power Source 1
- User Manual 1
- SAFETY SYMBOLS 7
- 1. Introduction 15
- 2. Specifications 16
- 2.2 Mechanical 24
- 2.3 Environmental 24
- 2.4 Regulatory 26
- 2.5 Front Panel Controls 26
- 3.1 Unpacking 29
- 3.2 Power Requirements 29
- 3.3 Mechanical Installation 30
- 3.4 Input Wiring – TB1 30
- 3.6 Connectors - Rear Panel 32
- Description 33
- Centronics 36
- Connector 36
- > 400 uS 36
- 24 i Series / iX Series 38
- 3.8 Output Voltage Ranges 40
- 3.9 Functional Test 41
- 28 i Series / iX Series 42
- 30 i Series / iX Series 44
- 34 i Series / iX Series 48
- 4. Front Panel Operation 51
- FUNCTION 53
- 4.2 Menu Structure 56
- 44 i Series / iX Series 58
- 4.2.2 Overview of Menu 1 58
- 4.3 Output Programming 91
- 4.5 Standard Measurements 97
- 4.7 Transient Programming 108
- 5. Principle of Operation 115
- 5.2 Overall Description 116
- 5.3 Oscillator Assembly 116
- 104 i Series / iX Series 118
- 5.4 Current Limit Board 119
- 5.5 Auxiliary Power Supply 119
- 5.6 DC-DC Power Converter 120
- 5.7 AC Control Logic 120
- 108 i Series / iX Series 122
- 5.8 AC Power Board 123
- 5.9 Input/Output Board 123
- 110 i Series / iX Series 124
- CAUTION 126
- 6. Calibration 127
- 118 i Series / iX Series 132
- 6.6 Non-Routine Calibration 134
- 124 i Series / iX Series 138
- 7. Service 139
- 9. Options 147
- 138 i Series / iX Series 152
- Refer to 157
- 158 i Series / iX Series 172
- 9.1.2.8 160 Test Selection 172
- 164 i Series / iX Series 178
- 168 i Series / iX Series 182
- 170 i Series / iX Series 184
- 172 i Series / iX Series 186
- 174 i Series / iX Series 188
- 176 i Series / iX Series 190
- 178 i Series / iX Series 192
- 9.2 IEC 61000-4-11 Option 194
- 9.3 IEC 61000-4-13 Option 201
- 196 i Series / iX Series 210
- 9.4 EOS Option 213
- 206 i Series / iX Series 220
- 208 i Series / iX Series 222
- Figure 9-39: 15003iX/3-EOS3 222
- 9.5 Mode iX Option 228
- 218 i Series / iX Series 232
- 9.6 Omni Options 236
- 226 i Series / iX Series 240
- 228 i Series / iX Series 242
- Power Switch and Lamp 244
- 80-250V SYNC INPUT FROM iX 250
- SOURCE INPUT,OR 250
- OTHER AC LINE VOLTAGE 250
- 9.8.2.8 704 Test Selection 273
- 260 i Series / iX Series 274
- 262 i Series / iX Series 276
- 266 i Series / iX Series 280
- 268 i Series / iX Series 282
- 270 i Series / iX Series 284
- 272 i Series / iX Series 286
- 274 i Series / iX Series 288
- 276 i Series / iX Series 290
- 278 i Series / iX Series 292
- 280 i Series / iX Series 294
- 282 i Series / iX Series 296
- 284 i Series / iX Series 298
- 286 i Series / iX Series 300
- 9.9.7 ABD Test Selection 309
- 296 i Series / iX Series 310
- 298 i Series / iX Series 312
- 302 i Series / iX Series 316
- Controls 319
- 308 i Series / iX Series 322
- 310 i Series / iX Series 324
- 312 i Series / iX Series 326
- 314 i Series / iX Series 328
- 9.10 WHM Option 331
- 10. Error Messages 334
- 322 i Series / iX Series 336
- 324 i Series / iX Series 338
- Table 10-1: Error Messages 338
- 11. Index 339
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