Zapi SEM-1C, User Manual

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Page 5
2 GENERAL CHARACTERISTICS
2.1 TECHNICAL SPECIFICATION
Chopper for Separately Excited DC motors ................................................... 1.0÷ 3.5kW
Regenerative Braking.
Voltage Range ............................................................................................ 24-36-48VDC
Maximum Field Current (all the versions) .................................................................. 35 A
Armature Switching Frequency ............................................................................... 16kHz
Field Switching Frequency ........................................................................................1kHz
Maximum Ambient temperature ............................................................................. + 40°C
Minimum Ambient temperature ................................................................................-30°C
Maximum temperature of Chopper......................................................................... + 80°C
FIeld resistance .......................................................................................... 0.3 ÷ 0.6 Ohm
VERSIONS MAXIMUM CURRENT BOOSTER CURRENT
VOLTAGE DROP IN
FULL CONDUCTION
24V-36V 200A (3') 220A (10'') 0.23V a 100A, 25°C
24V-36V 300A (2') 330A (10") 0.23V a 100A, 25°C
48V 180A (3') 200A (10") 0.18V a 50A, 25°C
2.2 CONTROL UNITS
2.2.a Microswitches
- Microswitches should have a contact resistance lower than 0.1
Ω
, and a leakage
current lower than 100 µA.
- When full load current is being drawn, the voltage drop across the Key Switch con
tact must be lower than 0.1V.
- If an Electromagnetic Brake is used, the Handle Microswitch must be able to operate
the Brake Coil.
- The Microswitches send a voltage signal to the microprocessor when an operating
request (running) is made.
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