Primary Switch Mode Inverter
UNV-F
Operation Manual
Page 12 (28)
BHB.UNV-F.D65-1050.HB101
6.2 Functional description
Inverters of the UNV-type are new switch mode inverters
with an innovate operation principle. The inverter transforms
the input side DC voltage into an AC voltage with high stabil-
ity concerning frequency, amplitude and waveshape. The unit
consists of following main parts:
1. Input / output connector HAN K 4/8 (UNV48-1.2F
UNV108-5.0F) / HAN K 6/6 (UNV48-5.0F) to connect in-
put, output voltage and signals
2. Passive filter to reduce RF interferences
3. Input circuit breaker (MCB) ; used as ON/OFF switch
4. Innovate DC/DC-converter topology consisting of
MOSFET/IGBT-converter , isolation transformer, rectifier
bridge to produce a voltage of appr. 380V DC, capacitor
block to store the DC voltage. The DC/DC-converter
modulates the input current to suppress the input AC.
5. Pulse width modulated inverter bridge (20kHz) with
IGBT`s to convert the DC voltage into an AC voltage with
high frequency and a stable amplitude
6. Monitoring system for input, output and internal parame-
ters
7. Output relay (necessary for paralleling operation)
8. Output circuit breaker (MCB), mechanically coupled with
DC circuit breaker
9. Output AC filter for RFI suppression
10. Control board for DC/DC converter
11. Control board for AC converter
12. Microprocessor based control unit performs controlling,
monitoring, adjustments (value storage) and displaying of
inverters parameter and serial communication via CAN-
Bus
6.2.1 Safe electrical decoupling
The unit fulfills the standard EN60950.
Observance of air and creeping distances, the isolation trans-
former and the separate wiring guarantee a safe electrical
decoupling between primary (input) and secondary (output)
side.