Drive Repairs

AC and DC Drive Repairs

From converters to inverters, Kontroltek can help with your repair.

AC and DC Drive Repairs

From converters to inverters, Kontroltek can help with your repair.

Book Your Drive Repair

We Repair Industrial Automation Parts

Drives – Motors – HMIs – Robots – PCBs – PLCs – CNCs
All brands and parts covered

What are AC and DC Drives?

The difference between an alternating current (AC) and direct current (DC) drive is the input. Both have an output of AC, but their inputs are AC and DC respectively.

An AC-AC drive would be considered a converter. And a DC-AC drive would be considered an inverter.

A drive controls a motor’s speed and torque by varying the motor input’s frequency and voltage.

What are AC and DC Drives?

The difference between an alternating current (AC) and direct current (DC) drive is the input. Both have an output of AC, but their inputs are AC and DC respectively.

An AC-AC drive would be considered a converter. And a DC-AC drive would be considered an inverter.

A drive controls a motor’s speed and torque by varying the motor input’s frequency and voltage.

Types of Drives

DC Drive

This is the oldest type of drive. They work specifically with DC motors. These have mainly been replaced by newer technologies.

Kontroltek specialise in obsolete technology.

Stepper Drive

Stepper drives, or stepper motor drivers, work specifically with stepper motors. Stepper drives work by sending current through various phases in pulses to the motor.

A stepper drive can have an input of DC or AC.

Servo Drive

A servo drive is responsible for powering a servo motor. They use positional feedback to provide the motor with a high-calibre precision, speed and motion control.

Servo drives can have inputs of either analogue or digital.

Spindle Drive

Spindle drives can vary the frequency and voltage to operate a spindle motor.

The drive sends three signals to the motor: stop, at speed or a fault signal. Spindle drives are usually used to control angular motion to cutting tools.

VF Drive

VFD stands for variable-frequency drive. A VFD is speed-adjustable, meaning it can control an AC motor’s speed and torque. It does this by varying the motor input frequency and voltage.

VFDs have reduced energy consumption and costs compared to other drives. They are also more efficient.

Soft Starter

A soft starter reduces the input current and limits the torque. This is useful to protect your equipment and reduce spikes. The life of the motor is extended, and less heating is required.

A VFD and soft starter are similar. The main difference is that a VFD can vary the speed of a motor, whilst a soft starter only controls the starting and stopping of the motor.

DC Drive

This is the oldest type of drive. They work specifically with DC motors. These have mainly been replaced by newer technologies.

Kontroltek specialise in obsolete technology.

Stepper Drive

Stepper drives, or stepper motor drivers, work specifically with stepper motors. Stepper drives work by sending current through various phases in pulses to the motor.

A stepper drive can have an input of DC or AC.

Servo Drive

A servo drive is responsible for powering a servo motor. They use positional feedback to provide the motor with a high-calibre precision, speed and motion control.

Servo drives can have inputs of either analogue or digital.

Spindle Drive

Spindle drives can vary the frequency and voltage to operate a spindle motor.

The drive sends three signals to the motor: stop, at speed or a fault signal. Spindle drives are usually used to control angular motion to cutting tools.

VF Drive

VFD stands for variable-frequency drive. A VFD is speed-adjustable, meaning it can control an AC motor’s speed and torque. It does this by varying the motor input frequency and voltage.

VFDs have reduced energy consumption and costs compared to other drives. They are also more efficient.

Soft Starter

A soft starter reduces the input current and limits the torque. This is useful to protect your equipment and reduce spikes. The life of the motor is extended, and less heating is required.

A VFD and soft starter are similar. The main difference is that a VFD can vary the speed of a motor, whilst a soft starter only controls the starting and stopping of the motor.

Potential Problems

Troubleshoot your drive

High current

Low voltage

Overheating or smoking

Worn or loose components

Faulty connection

Poor insulation

Corrosion of parts

Environmental damage

If your drive does suffer one or more of these issues, it will likely cease working. This means the machine it is in will also stop operating.

Understanding Drives

There are many varieties of drive. And even more brands. Our engineers have rich experience, great knowledge and receive continuous training to ensure whatever drive comes into our workshop can be repaired.

As different series are released for different brands, our Research & Development Department constantly updates our testing facilities to ensure comprehensive care.

We also understand what’s important to you. We will repair your drive fast, do it for a fair price and warrant our work for 12 months afterwards.

Fast Turnaround

It doesn’t matter if your circuit board has Kontroltek has the fastest turnaround for drive repairs in the UK. For standard repairs, we will have your part repaired and returned within 10 working days. For emergency repairs, your part will be back with you on the same day to three days.

Your drive plays a vital role in your plant’s production. If you require us on-site, our engineers are available 24/7, 365 in the UK.

Most competitors offer a 20-day turnaround, whilst OEMs can be anywhere between three to six weeks.

Total Testing

We repair all types of drives and test all sizes. As well as finding the fault with your part and fixing it, we test all other components of the drive to ensure there are no other problems.

We will also remove and replace all electrolytic capacitors in your drive. This means a complete overhaul of the drive, which will further extend its operational life.

Your drive will also be load tested on an appropriate motor and run with or without feedback. Various control methods can also be used to run the drive such as analogue, RS232/485, and Fieldbus.

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