Zapi SEM-Zero - General Characteristics; Technical Specification; Control Units; Microswitches

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2 GENERAL CHARACTERISTICS
2.1 TECHNICAL SPECIFICATION
Chopper for Separately Excited DC motors ...................................................0.5 ÷ 2.0kW
Regenerative Braking.
Voltage Range ................................................................................................. 24-36VDC
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
VERSIONS MAXIMUM CURRENT BOOSTER CURRENT
VOLTAGE DROP IN
FULL CONDUCTION
24 / 36V 150A (3') 180A (10'') 0.23V at 50A, 25°C
24 / 36V 200A (2') 230A (10") 0.23V at 50A, 25°C
2.2 CONTROL UNITS
2.2.a Microswitches
- Microswitches should have a contact resistance lower than 0.1W , 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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