Michael Koch GmbH
About us
Active energy management devices and safe brake resistors for electric drive technology, under the slogan “Energizing Productivity", bring concrete benefits to our customers. More gain, less pain!
Our active energy management systems provide numerous advantages. Either by directly saving energy, or by increasing the productivity of your machine or system. The active energy management systems in many cases, can lead to an acceleration of the process and with it an increase in the amount of produced parts per time unit. Or it intercepts voltage dips which usually cause standstills and/or a loss of data. Furthermore, it can reduce peak loads and keep up the energy supply to the system in case of planned and unplanned mains interruptions: for seconds, minutes or even longer. Because it manages different storage media, which can be chosen based on the applications requirements. And all of that maintenance-free.
Products & services
Active Energy Management Devices with internal storage
The PxtFX devices are predestined for applications with frequent, short cycles. With a current load capability of 20 Ampere continous and 40 Ampere peak for about one minute compared to storages, which may have a maximum voltage of 450 volts DC, the PxtFX can generate up to 18 kilowatts of power. The device can be equipped ex works with a storage volume of two or four kilojoules. The active devices with the designation PxtFX are supplemented by the PxtEX, the modular storage unit with one or more aluminum electrolytic capacitors.
Active Energy Management Devices with external storage
The PxtRX devices are predestined for applications in connection with higher energy density storage units, such as double layer capacitors or batteries. The PxtRX is designed for a current load capacity of 30 Ampere continuous and 60 Ampere peak for 45 seconds. In combination with a high storage voltage of up to 800 Volt DC, the device is able to generate a power of up to 48 kilowatts. If this performance is not sufficient for the application, several PxtRX devices can be connected in parallel. Depending on the application, active energy management systems that fill control cabinets can thus be created.
Safe Brake Resistors
Brake resistors are load resistors when operating a frequency inverter. In regenerative operation of the motor, braking resistors represent a load which takes over the regenerative energy of the motor and thus brakes it. We offer you safe brake resistors as single modules in wire-wound and PTC-Technology as well as combinations, as a standard model or individually sized and designed for your application.
Current-based Peak Load Reduction
The PxtMX is a small but very useful module of the Pxt product family, our new generation of active energy management devices and systems. The PxtMX can be used in conjunction with a Pxt energy management system to implement current-based automatic peak load reduction via Plug&Play, which is accurate to the single ampere. PxtMX Plug-on communication module EPS - automatic mains load peak limitation (optional) EtherCAT (optional)
Active Energy Management Systems
KTS refers to the standard control cabinets that we offer in the event that our energy management devices no longer find room in the control cabinet of the machine or system. After all, many machine operators also want to use the advantages of our energy management systems for existing machines. Retrofitting is the keyword for this. But for new machines. For these situations, we can equip control cabinets to suit the individual application and supply them fully assembled and ready for connection.
Active Energy Management Devices with internal storage
With a current load capacity of 5 amperes effective continuous and 40 amperes peak for 3 seconds compared to the storage unit, which may have a maximum voltage of 450 volts DC, the PxtTX device can generate up to 18 kilowatts of power. The device has a closed housing to provide special protection against suspended particles in the air. Heat is dissipated by convection via heat sinks. The device can be equipped ex works with a storage volume of two or four kilowatt seconds. Built into the device as standard is the automatic detection of the brake transistor switch-on voltage threshold, which enables the device to work with all commercially available frequency inverters and servo controllers in a plug play manner. The extensive safety features of the PxtTX protect against reverse polarity of the DC link connections, against the connection of loaded memories and against overloading the system on both the memory and DC link sides. Internal fuses are standard. The PxtTX device is equipped with the option of inserting an SD memory card, an external 24-volt power supply, status indicators via LEDs, boot loading and reset options and 6 digital I/Os. This is supplemented by output functions via a USB module.