VFD550i Servo Drive – High-Performance Specifications for Precision Injection

Product Specification

1. Product Features

The VFD550i is a dedicated servo drive specifically engineered for injection moulding machine applications. It features a built-in hydraulic control macro that provides integrated pressure and flow closed-loop control, eliminating the need for external PID controllers.

The drive is available in a wide power range from 5.6A to 152A at 380V, covering everything from small to large injection moulding machines. It supports multiple control modes including V/F control, sensorless vector control, and closed-loop vector control, giving users flexibility to choose the best performance level for their needs.

Encoder compatibility is another strong point. The drive works with resolver, ABZ incremental encoders, and ABZUVW incremental encoders, making it adaptable to both asynchronous and permanent magnet synchronous motors.

In terms of I/O, the drive offers three analog inputs – AI1 for pressure command, AI2 for flow command, and AI3 for pressure sensor feedback – plus analog outputs for seamless system integration. All models come with a built-in braking unit, and a clear braking resistor selection table is provided for easy matching.

The LED keypad is user-friendly, with a 5-digit display, indicator lights for Hz, A, V, RPM, and percentage, and a jog function for convenient operation. The drive also supports motor temperature sensor input with overheat warning and fault protection, as well as multi-pump slave connection for complex hydraulic systems. Command sources can be selected from keyboard, terminal, or communication protocols such as CAN or CANopen.

2. Product Performance

The VFD550i delivers high-precision speed and torque control through its closed-loop vector control capability, which is critical for maintaining stable pressure and flow regulation during injection moulding cycles. The dedicated pressure sensor feedback loop, combined with adjustable PID parameters, ensures stable pressure holding with minimal fluctuation – a key requirement for high-quality moulding.

Dynamic response is excellent, thanks to adjustable ASR speed loop gains that allow fine-tuning for rapid pressure build-up and flow changes. The drive features multiple auto-tuning functions including static self-learning for motor parameters, rotational self-learning for enhanced vector control, encoder self-learning for closed-loop operation, and AI zero-drift calibration for accurate analog signal processing.

An intelligent sleep and wake function improves energy efficiency during idle cycles. The drive can enter sleep mode based on frequency or analog input, with adjustable thresholds and delay times. Overload capacity is robust, with built-in electronic thermal overload protection for both the drive and the motor.

For troubleshooting, the drive logs the last three faults with detailed status records, making diagnosis quick and efficient. The carrier frequency can be automatically adjusted based on speed and temperature, balancing noise levels and heat dissipation for optimal operation.

3. Our Services

We provide comprehensive technical support for every stage of the customer journey. From the very beginning, our team assists with model selection to ensure the right drive is chosen based on motor power, encoder type, and specific application requirements.

During installation and commissioning, we offer full guidance covering power-on procedures, motor parameter tuning, encoder learning, pressure calibration, and fine-tuning – all supported by our detailed user manual with clear wiring diagrams, parameter tables, and fault code explanations.

Our after-sales support includes remote troubleshooting, fault diagnosis assistance, spare parts availability, and software or firmware updates when applicable. We also provide technical training for our customers' engineering teams, covering installation, commissioning, and system optimization.

Importantly, we view our relationship with clients as a long-term partnership. We listen to customer needs, provide tailored recommendations, and respond promptly to technical inquiries – going beyond a simple one-time transaction.

4. Our Company Strengths

We are not a general-purpose drive supplier. Our company specializes exclusively in servo drive technology for injection moulding applications, which means we understand the plastics industry's unique challenges and requirements far better than broad-based competitors.

The VFD550i series is a testament to our engineering expertise. It incorporates advanced closed-loop vector control and hydraulic macros developed specifically for high-performance oil pump control. Our drives are built with robust IGBT modules and comprehensive protection features including overvoltage, overcurrent, short circuit, overheating, and phase loss protection, all backed by rigorous testing.

While some customers may question our pricing compared to premium brands, we offer reliable performance and feature sets that rival those of major international names – at a significantly more accessible price point. This makes us a cost-effective alternative without compromising quality or functionality.

We serve international markets and have extensive experience working with diverse machine brands, including Japanese injection moulding machines that typically use 0 to 5 volt command signals. Our global reach and cross-cultural communication capabilities enable us to support customers in multiple regions effectively.

Above all, we are customer-centric. We believe in building trust through transparency, reliability, and genuine commitment to our clients' success. Our goal is not just to sell a product, but to provide a complete solution that helps our customers improve their production efficiency, reduce energy consumption, and lower overall operating costs.

Related words:

 Servo Drive for Injection Molding

 Hydraulic Servo VFD

 Injection Molding Motor Control