YASKAWA ∑ - II Series SGMBH/SGDH AC Servo System

Yaskawa ∑ - II Series SGMBH/SGDH Servo Drive System: Technical Explanation and Application Guide

System Overview and Core Components

The ∑ - II series servo drive system mainly consists of two parts: SGMBH servo motor and SGDH servo driver (SERVOPACK), forming a high-performance closed-loop control system. This system is designed specifically for high-power applications ranging from 22kW to 55kW at a voltage level of 400V, meeting the stringent requirements for high dynamic response and stability in industrial sites.

1. SGMBH servo motor

SGMBH motor is a synchronous (permanent magnet) servo motor in the ∑ - II series, which has the following significant characteristics:

High torque output: The rated speed is 1500 min ⁻¹, the maximum speed can reach 2000 min ⁻¹, and it provides up to 200% instantaneous peak torque, ensuring that the equipment has strong power during start-up and acceleration.

Multiple capacity options: Offering 10 specifications ranging from 22kW to 55kW (such as 22kW, 30kW, 37kW, 45kW, 55kW) to meet different load requirements.

High precision feedback: Equipped with a 17 bit incremental encoder as standard, and can choose between 17 bit or 20 bit absolute encoders to achieve high-precision position and velocity detection.

Durable and sturdy: Adopting a fully enclosed, self cooling (with fan) structure, with a protection level of IP44, suitable for harsh industrial environments such as dust and oil mist. The motor is equipped with a built-in thermal protector (Thermostat) to monitor the temperature of the motor and prevent overheating damage.

2. SGDH servo drive

The SGDH driver is a servo amplifier specifically designed for SGMBH motors. Its core function is to convert instructions (analog or pulse) from the upper controller into three-phase AC power to drive the motor and achieve high-precision closed-loop control.

Multi functional control: supports three basic modes: speed control (analog reference), position control (pulse train reference), and torque control (analog reference), and can flexibly switch multiple composite control modes through parameters.

Integrated operation and monitoring: Built in panel operator, can also be connected to handheld digital operator (JUSP-OP02A-2) for parameter setting, status monitoring, trial operation, and fault diagnosis.

Rich I/O interfaces: Provide all input and output signals required for interaction with the upper computer through the CN1 (50 pin) connector, including servo ON, alarm, pulse input, analog reference, encoder frequency division output, etc. The CN2 connector is used to connect the motor encoder.

System integration and installation wiring

Correct installation and wiring are the foundation for stable operation of servo systems. The ∑ - II series products have fully considered the installation convenience and anti-interference ability of industrial sites in their design.

1. Installation of servo motor

Installation environment: The motor should be installed indoors, without corrosive/flammable gases, with good ventilation, an ambient temperature of 0-40 ° C, and a relative humidity of 20% -80% (without condensation). For environments with oil mist or moisture, it is necessary to install protective covers and use motors with oil seals.

Mechanical connection: The motor shaft and load shaft need to be precisely aligned through a flexible coupling. Before installation, the anti rust paint on the shaft end should be removed to avoid direct impact on the shaft end and prevent damage to the internal encoder. The allowable radial and axial loads of the motor must strictly follow the manual regulations.

Electrical connection: Connect the motor power lines (U, V, W) to the corresponding terminals of the driver. The built-in fans (U (A), V (B), W (C)) of the motor need to be connected to a three-phase 380-480VAC power supply and ensure that the fan rotates correctly (the wind direction blows from the non load end of the motor to the load end). The built-in thermal protector (1, 1b) must be connected to the control circuit to cut off the power supply when the motor overheats.

2. Installation of servo drive

Installation method: The SGDH driver adopts a base installation method and must be vertically installed inside the control cabinet to ensure heat dissipation.

Heat dissipation requirements: The drive mainly relies on natural convection or forced air cooling for heat dissipation. When installing multiple drives side by side, a gap of at least 10mm should be left between the left and right sides, and a gap of at least 50mm should be left between the top and bottom. It is recommended to install a cooling fan at the top to ensure that the ambient temperature does not exceed 55 ° C.

Main circuit wiring: The input terminals (L1/R, L2/S, L3/T) of the driver main circuit are connected to a three-phase 380-480VAC power supply. The control circuit power supply (DC24P, DC24N) needs to be connected to 24VDC. The motor output terminals (U, V, W) are directly connected to the servo motor. The regeneration resistor terminals (B1, B2) can be connected to external regeneration resistor units as needed.

Grounding and anti-interference: The grounding terminal (⨁) of the driver and the grounding terminal (FG) of the motor must be reliably grounded with a grounding resistance of less than 100 Ω. The signal line and power line must be wired separately with a minimum interval of 30cm. It is recommended to install a noise filter on the input power side and surge suppressors on the relay and contactor coils to suppress electromagnetic interference.