SEH BLDC driver, speed control of brushless dc motor

High precision BLDC motor drivers
The SEH series high precision BLDC motor driver has power of 120W, 400W, 750W. The rated voltage is 22VAC.

SEH series 3 phase bldc motor driver

The SEH high precision BLDC driver is suitable for high voltage BLDC motors with a power of 120w-750w and below.It has display and is easy to operate. It supports RS-485 communication protocol and 5 speed regulation modes.

1 2

Features:

220VAC input voltage, 120W/400W/750W selectable.

Self-contained digital tube display, intelligent display of various parameters

Adjustable speed with knob

External potentiometer speed regulation

Acceleration and deceleration time setting

Rated speed accuracy as low as ±0.5%

RS485 communication signal

Consult

Specification

The SEH series driver is high-voltage 3 phase brushless motor controller . There have 3 models available, which are suitable for 120w, 400w and 750w bldc motor.

Model	Rated output power	Supply voltage	Output current	Communication port	Rated speed of bldc motor
SEH120R	120W	220VDC	1.6A	RS485	3000rpm
SEH400R	400W	220VDC	2.0A	RS485	3000rpm
SEH750R	750W	220VDC	12A	RS485	3000rpm

Panel discription

Speed regulation

Knob speed regulation

Turn the knob on panel to select speed.

Driver pannel speed setting

Set speed by buttons on the panel following beow steps.

Externa potentiometer speed regulation

10KΩ is recommended to adjust the speed.Connect the central pin of the external potentiometer to the SV terminal, and connect the other two pins to the GNDE port and the +5VE port respectively.

External analog signal speed regulation DC 0-5V

Wire as below picture

Relationship between speed command voltage and motor speed

RS 485

The communication function of this driver adopts Modbus protocol, which conforms to the standard GB/T 19582. 1-2008. Using RS485-based two-wire serial link communication, the physical interface adopts 3.81mm, 3PIN plug-in terminal, the terminal definition is shown as shown in attached link. Three wires need to be connected: B, A, GNDE. The communication address can be set through the panel operation.The 120Ω terminal matching resistance needs to be externally connected by the user.