Ref.: WB-VL-SM Ver.1 3.doc
9
3. DESCRIPTION OF MAIN PARTS
3.1.
DSP BOARD WITH MINI UPS
Digital Signal Processing board receives the raw unbalance signals from Piezo sensor,
Wheel diameter & Wheel width from RLS Sensor and amplifies it through analog signal
conditioners. Then the signals are processed digitally to ensure stable & accurate
unbalance readings & Wheel data.
A set of Schmitt-Triggers are deployed to fine tune the Revolution & Index waveform in
order to achieve the accurate RPM of wheel.
Serial RS232 converter for TX & RX helps in transferring data effectively to Display unit
An Optical Encoder is deployed for acquiring wheel parameters by just rotating the
wheel instead of obtaining manual input via keyboard interface.
A Mini UPS function is deployed for sourcing the power to the SBC (Raspberry Pi
board) and it gives a standby power upto 10 Minutes, during the sudden power failures.
This prevents the failure of Memory card / OS corruption due to abrupt power OFF.
Fig. 9
3.2.
POWER PANEL
Power panel hold the Electronic assemblies of Balancer meant for data processing,
display interface, power control & distribution. This power panel is fixed inside the
Cabinet. Major assemblies of the Power panel are described below:
3.2.1.
MOTOR CONTROL BOARD
This board is used to switch ON/OFF AC supply to the motor using Digital
level signal applied from DSP board. This board also acts as a power
distributor.
Two different types of Motor control board are being used to control 1Phase
220V/110V (For LCV model) and 3Phase 440V/220V (For HCV model) Motor.
Motor control board has Electro-Mechanical relays to switch the AC supply by
energising the relay coils with DC voltage.
It has two different set of relay switching function. One function is to run the
Motor and another is to stop the wheel rotation by applying reverse voltage
once the unbalance is calculated.
3.2.2.
MOTOR CONTROL BOARD CUM EMI FILTER BOARD
(Applicable only for
Rev.50 and above)
This board is used to switch ON/OFF AC supply to the motor using Digital
level signal applied from DSP board. This board also acts as a power
distributor.
The EMI Filter section filters the Electro magnetic interference noise. Then
clean AC power is delivered to SMPS and Monitor. Also, it ensures that
system not generate any EMI noise to the outside world.
Two different types of Motor control board are being used to control 1Phase
220V/110V (For LCV model) and 3Phase 440V/220V (For HCV model) Motor.
Motor control board has Electro-Mechanical relays to switch the AC supply by
energising the relay coils with DC voltage.
It has two different set of relay switching function. One function is to run the
Motor and another is to stop the wheel rotation by applying reverse voltage
once the unbalance is calculated
Summary of Contents for LX WB-VL-65 DSP
Page 48: ...Ref WB VL SM Ver 1 3 doc 45 7 DIAGRAMS 7 1 BLOCK DIAGRAM 7 1 1 LCV MODELS Fig 99...
Page 49: ...Ref WB VL SM Ver 1 3 doc 46 7 1 2 HCV MODEL THREE PHASE OPERATION Fig 100...
Page 50: ...Ref WB VL SM Ver 1 3 doc 47 SINGLE PHASE OPERATION Fig 101...
Page 51: ...Ref WB VL SM Ver 1 3 doc 48 7 2 WIRING DIAGRAM 7 2 1 LCV MODELS Fig 102 1 of 3...
Page 52: ...Ref WB VL SM Ver 1 3 doc 49 Fig 102 2 of 3...
Page 53: ...Ref WB VL SM Ver 1 3 doc 50 Fig 102 3 of 3...
Page 54: ...Ref WB VL SM Ver 1 3 doc 51 7 2 2 HCV MODEL THREE PHASE OPERATION Fig 103 1 of 3...
Page 55: ...Ref WB VL SM Ver 1 3 doc 52 Fig 103 2 of 3...
Page 56: ...Ref WB VL SM Ver 1 3 doc 53 SINGLE PHASE OPERATION Fig 103 3 of 3...
