PM864A DCS excitation system

Product parameters

Model: PM864A

Brand: ABB

Size: 10cm x 10cm x 30cm

Weight: 1.2KG

Color: White Black

Working voltage: 5V

Working temperature: -10 ℃ to 50 ℃

Communication interface: RS232, RS485, CAN

Product specifications

Support for MODBUS protocol

Support hardware flow control

Using high-speed CMOS devices

Support for data caching

application area

PM864A is mainly used in the field of industrial automation, such as DCS PLCs, industrial controllers, robots, etc.

PM864A is mainly used in steel manufacturing, thermal power generation, hydroelectric power generation, glass manufacturing, paper mills, cement factories, petrochemicals

Chemical fiber, pharmaceutical manufacturing, rubber, plastics, ferrous metal food, machine tools, specialized equipment, transportation vehicles, mechanical equipment

Electronic communication equipment, instruments and beverages, tobacco processing, clothing, textiles, leather, wood processing, furniture, printing, etc

Model: PM864A Brand: ABB Archive Function: Communication Function Product Certification: Qualified

Working voltage: 24V Internal variable: No pattern Type: Vector diagram Applicable range: Industrial type

Number of screens: 4 Imported or not: Yes Customized for processing: No

Alarm function: Product name: Module Input voltage: 24V Rated current: 5A

Special service: including postage. Remarks: one-year warranty. Operation method: remote control

Applicable motor: servo motor system memory: 8MB Display color: 99.9 color gamut

Power voltage: 220V Input method: Current Input Material code: 65218

Communication interface: HDMI interface Working temperature: 60 Material number 26854 Other functions Analog communication

Output frequency: 50HZ Rated voltage: 24V Alarm type: Light alarm

Disconnect capacity: 0.01 Vector graph support: Minimum number of packages supported: 1

Display type: IPS USB interface quantity: 2 interfaces Memory card slot: 2

Panel protection level: 3 Memory expansion capacity: 128MB User script support: supported

Speed response frequency: 1MS Working environment temperature: -40 to 100 Insulation withstand voltage test: Passed

Third party communication products: ABB controllers available for sale in: nationwide

Product Instructions

Please install PM864A correctly on the device and connect the communication interface cable properly.

Please refer to the user manual for operating PM864A to ensure proper use.

Product Introduction

PM864A is a high-performance industrial automation communication module that uses high-speed CMOS devices, supports MODBUS protocol, and supports
hardware flow control. It is an ideal choice in the field of industrial automation.

The most fundamental reason for distinguishing these two motor types is that the
design of the air gap magnetic field is different. So the following differences arise

The back EMF waveform is different:

BLDC: Approximate trapezoidal wave (ideal state);

PMSM: sine wave (ideal state);

The three-phase current waveforms are different:

BLDC: Approximate square wave or trapezoidal wave (ideal state);

PMSM: sine wave (ideal state);

Differences in control systems:

BLDC: usually includes position controller, speed controller and current (torque) controller;

PMSM: Different control strategies will have different control systems;

Controls are different:

BLDC: 120-degree square wave current, using PWM control;

PMSM: Positive Xuan wave current, controlled by SPWM SVPWM.

However, in actual control, brushless DC can also be controlled by FOC, and permanent magnet
synchronous motors can also be controlled by square waves.

Just like the controllers of electric vehicles, I have disassembled and studied three or four. The interfaces are
all the same, the control chips are different, and of course the control algorithms are also different. Electric vehicles
controlled by sine waves have very low sound when starting and running, and there is no jitter during operation;
but electric vehicles controlled by square waves have very obvious sounds, and the jitter during operation can also
be felt. The judder is due to definite torque ripples.

Motors controlled by square waves have higher power efficiency, because motors controlled by sine waves have a lower effective voltage.

4. Control technology of permanent magnet synchronous motor

Permanent magnet synchronous motors and brushless DC motors can be operated using the same control method.

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