EM-346A is a brushless DC-motor driver with hall sensor feedback. The unit has a mosfet power stage with good efficiency and it meets today's EMC requirements. The driver can be used with 120° commutation. This driver has true 4Q power stage, which makes it possible to use regenerative braking. In this braking method the supply voltage rises. This voltage rising can be controlled with a braking resistor. If using a battery supply, then the braking energy can be lead back to battery and a braking resistor is not needed. The unit has the basic digital command inputs like direction, brake, start/stop, disable and there are analog inputs for speed and current control. One digitally presetable second speed (speed-2) is possible to activate with digital command input. EM-346 has two NPN outputs for fault and overcurrent indication use. Some input and output functions can be modified with parameters. Driver includes overvoltage, undervoltage and overtemperature protection. These fault situations are indicated with fault on-board LED. Overtemperature and current limit situations can be reset with reset input, reset-timer or by setting analog speed control to value to 0.
There are two control options for speed. Direct control ( open loop ) sets motor voltage in propotion to control voltage as with a standard DC-motor. Closed loop uses hall sensor feedback for speed control. This mode offers good speed regulation. Start and stop ramps work in both modes. Speed adjust range, closed loop rpm range and ramps can be set with parameters. Analog inputs are filtered so that they can also use PWM signal for controlling speed and current.
Settings can be done digitally with EM-236 interface unit or with Emen-Tool lite program installed in PC and EM-268 adapter cable. Parameters are stored into non-volatile memory of device. This interface unit can also monitor the current and rpm of motor.
Device can be installed in DIN-rail base and some enclosure options are also available.
| TECHNICAL DATA | |
|---|---|
| Supply Voltage | 12–48 Vdc (11–58 Vdc) |
| Overvoltage Shutdown | 60 V |
| Undervoltage Shutdown | 10 V |
| Idle Current | Typ. 30 mA |
| Max. Continuous Current | 30 A @ 24Vdc, Tamb. 40 °C |
| 25 A @ 48Vdc, Tamb. 40 °C | |
| Max. Peak Current | 60 A (max. 2 s) |
| Max. Brake Output Current | 10 A |
| PWM Frequency | Typ. 16 kHz |
| Overtemperature Shutdown | 90 °C |
| Fan Activation Temperature | 55 °C |
| Current Limit Setting | 1–60 A (step 1 A) |
| Current Limit Analog Scale | 0–5 V = 0–60 A |
| Digital Input Logic Level | “Off” = 0–1 V or open / “On” = 4–30 V |
| Digital Input Impedance | 10 kΩ |
| Digital Input Response Time | 2 ms |
| Analog Input Range | 0–5 V up to 0–10 V |
| Analog Input Resolution | 10-bit (1024 steps) |
| Position Counter Resolution | 31-bit (2,147 million steps) |
| Analog Input Impedance | 100 kΩ |
| Analog Input Filter | 100 Hz |
| Hall Input Max. Frequency | 800 Hz |
| Fault Output | PNP, 5/12 V, max. 50 mA |
| Fan Output | NPN, max. 100 mA |
| EMC Compliance | Measured for industrial environment |
| PCB Flammability Class | UL94V-0 |
| Dimensions | 108 × 91 × 30 mm |
| Weight | 230 g |
