Category: MOOG

Application Notes

Scope

These application notes are a guide to applying the G123-814 Dual PWM Amplifier. They show you how to install, connect and adjust the PWM amplifier.

They do not cover how to select a proportional valve or how to design a closed-loop system.

Instructions

The G123-814 Dual PWM Amplifier is used to drive two coils of a three position 24V solenoid proportional valve.

It is designed for low-end closed-loop applications. It allows the use of very low cost proportional valves where much more expensive servo valves would normally be required.

Using it with the companion servo amplifier G122-824 and a proportional valve produces an economical closed loop solution.

Applicability

The G123-814-001 has a closed dcs-sis.com loop configuration and is used with Hydrolux WP series proportional valves.

Important specifications considered include 24V @ 800mA coil and 12% spool overlap.

Output current is 25% higher than rated to ensure that maximum flow is not unduly affected by valve production tolerances and spool Bernoulli forces.

Deadband compensation circuitry to eliminate spool overlap has been optimised for flow bench and field applications. Deadband compensation is not user adjustable. Applying this amplifier

Apply this amplifier to other valves with the same specifications to obtain the same performance as Hydrolux valves.

The G12-814 is not suitable for conventional open-loop proportional valve applications. A zero flow condition is highly unlikely as the deadband compensation circuit cancels out spool overlap.

Zero flow conditions are unlikely with zero coil current as the deadband compensation circuit cancels out spool overlap.

Mounting

Installation consists of mounting a horizontal DIN rail to the vertical rear surface of an industrial steel enclosure.

The rail release clips on the G123-814 should face downward to allow front panel and terminal markings to be clearly readable and to allow cooling airflow to the internal electronics.

An important consideration for module placement is electromagnetic interference (EMI) from other equipment in the enclosure.

For example, VFs and AC servo drives generate high levels of EMI. be sure to check other equipment for EMC compliance before placing it near the G123-814.

Cooling

Vents at the top and bottom of the G123-814 chassis provide cooling for internal electronic equipment. These vents should be kept clear.

It is important to ensure that the equipment below does not generate hot exhaust gases that could heat the G123-814.

The Ruggedised Motion Controller is part of our Motion Controller range and is designed for high speed control and extreme environmental conditions.

It is suitable for both electric and hydraulic motion systems. It can be mounted directly on the machine without the need for an additional electronic cabinet.

For flexible communication, several models with different interfaces are available: -EtherCAT main function for

-EtherCAT master for real-time communication with valves, drives and external devices / 0

– EtherCAT slave for real-time communication with PLC host systems

-CAN/CANopen interface for communication, e.g. with sensors.

Profibus-DP slave interface for PLC host systems

-Ethernet connection for programming, commissioning and visualisation

-USB 1.1 host interface

The motion controller has the same high computing power as other Moog motion controllers and can be used with the powerful

IEC 61131 development environment Moog Axis Control Software (MACS) for free programming.

The innovative combination of rugged design, advanced computing power and flexible fieldbus support makes the ruggedised

motion controllers an excellent choice for most high-performance embedded control solutions.

Benefits

Special housing with high protection class (IP67) for wet and dirty environments

-Extended operating temperature range

High vibration resistance (30g vibration, 50g shock).

Suitable for harsh environments

-Extended resistance to fluid contamination dcs-sis.com and corrosion

-Flexible communication via various fieldbuses

Advanced computing capabilities

Integrated PLC functionality

Applications

Wind turbines

Presses and metal forming

Heavy industry (steel, aluminium)

Test and simulation systems

Chemical industry

Robotics

The L180 servo drive is used to control MOOG brushless servo motors.

These are three-phase motors with 8 or 12 poles (4 or 6 pole pairs) with bipolar resolvers.

The L180 servo drive is fully digital. The high-performance torque and speed control meets all requirements for fast response and high control accuracy.

The digital control allows full diagnostics, motor parameter adjustment, data and fault detection using a PC-based graphical user interface (GUI).

The L180 servo drive features the following:

Power supply

– Single-axis unit that includes a regenerative dcs-sis.com module to minimise wiring and space requirements.

– 230 V three-phase or single-phase.

– Optional: External filter in the power supply is CE compliant.

– The drive is designed to Protective Extra Low Voltage (PELV) standards. An autotransformer is sufficient for the mains input.

Power Driver

– Galvanic isolation between control and power electronics.

– IGBT output stage.

– Digital PWM current loop provides low ripple motor current and high motor efficiency.

Digital Controller

– Fully digital servo drive for brushless motors with resolver.

– Easy software download via RS232 serial connection.

– Temperature regulated fan cooling.

– Multi-loop control (torque and speed).

– Sine current output ensures smooth torque and performance at low speeds.

– 7-segment status indicator for diagnostic display.

User Inputs

– ±10VDC differential analogue input for speed or current commands.

– RS232 serial port.

– Limit switches for bi-directional overrun protection.

– Optional external 24VDC power supply for control and interface boards in the event of a mains power failure.

User Outputs

– Programmable incremental encoder analogue output with 1 to 2048 ppr resolution (extrapolated), differential RS 422 line driver output.

– Programmable supervisory relays to indicate ready, alarm or enabled status.

Protection Features

– The power stage is short-circuit and thermal protected.

– Motor thermal protection through I²t limiting and thermistors.

– Detects resolver faults and motor wiring faults.

The L180 servo drive features the following:

Power supply

– Single-axis unit that includes a regenerative module to minimise wiring and space requirements.

– 230 V three-phase or single-phase.

– Optional: External filter in the power supply is CE compliant.

– The drive is designed to Protective Extra Low Voltage (PELV) standards. An autotransformer is sufficient for the mains input.

Power Driver

– Galvanic isolation between control and power electronics.

– IGBT output stage.

– Digital PWM current loop provides low ripple motor current and high motor efficiency.

Digital Controller

– Fully digital servo drive for brushless motors with resolver.

– Easy software download via RS232 serial connection.

– Temperature regulated fan cooling.

– Multi-loop control (torque and speed).

– Sine current output ensures smooth torque and performance at low speeds.

– 7-segment status indicator for diagnostic display.

User Inputs

– ±10VDC differential analogue www.cniacs.com input for speed or current commands.

– RS232 serial port.

– Limit switches for bi-directional overrun protection.

– Optional external 24VDC power supply for control and interface boards in the event of a mains power failure.

User Outputs

– Programmable incremental encoder analogue output with 1 to 2048 ppr resolution (extrapolated), differential RS 422 line driver output.

– Programmable supervisory relays to indicate ready, alarm or enabled status.

Protection Features

– The power stage is short-circuit and thermal protected.

– Motor thermal protection through I²t limiting and thermistors.

– Detects resolver faults and motor wiring faults.