About Converters and Power Supplies Center

Online - Single,Double, Parallel, Hot Standby and Load share

High power - up to 250 KVA single phase and 500 KVA three-phase (higher power by order)

High reliability and efficiency

High power quality

Low output distortion

Fast Response to step loading

accordance with IEC, IPS, NEMA standards

Automatic charge of Different types of battery

power supplying of batteries and Load simultaneously

• Online double conversion
• High power factor  > 0.99
• up to 8 parallel redundancy
• Full DSP control
• Cold Start
• Automic restart
• economic operation mode
• Emergency Shut Down
• Rectifier and inverter with IGBT Base and PWM control
• Support generator input
• Options: SNMP card/Relay card/Parallel board

The JDEVS inverters are Submited  continuous Load and safe For special applications. The range of this production is from 1KVA to 500KVA (more power to order) designed according to international standards and manufacturing according to customer requirements.

Battery Bank voltage measurement

temperature of battery room measurement

Battery temperature measurement

JDEVS uses the latest developments in the field of electric motors and tries to use an advanced combination of different components of the drive system with the policy of stable cooperation with the main suppliers of motor traction and concluding professional contracts with different parts of the supply chain. 

Through cooperation with potential suppliers, traction motors can be produced with different requirements specified by the customer and in different insulation classes.

The auxiliary power module converts 1500 VDC or 750 VDC line voltage into three-phase AC voltage intended for supplying the train’s air-conditioning unit and compressors, single-phase AC voltage for lighting and service purposes, and DC voltage intended for charging batteries and supplying control equipment. This module converts DC input voltage into 380 VAC and 110VDC for the aforementioned purposes.

Auxiliary converters for subway trains are designed to be an efficient and highly reliable power supply. JDEVS designs and manufactures auxiliary converter systems which are compact and light for the entire range of supply voltages.

The main function of the Motor converter module (MCM) is to convert input DC voltage to AC voltage. The MCM is based on insulated gate bipolar transistor (IGBT) and employs three identical phases. Each phase is connected to the DC link in parallel. The IGBTs located in each phase convert the stabilized DC link voltage into a three-phase power with variable voltage and variable frequency, by switching on and off. The produced three-phase power feeds the two traction motors in parallel.

The set of interfaces between the collector shoes and the pantographs connected to the third rail or upstream grid and the propulsion system are known as high voltage DC power distribution box. In addition to monitoring equipment and voltage and current sensors; they also have the necessary protective equipment for fault conditions. In the design of the JDEVS, the necessary equipment for the protection and prestart of equipment is located in these boxes. It is also possible to integrate, design and manufacture these boxes with the converters required by the propulsion system in a common box.

Electrodynamic braking is produced by reversing the power generated by the motors through the three-phase converter and the power is fed back to the line voltage. This power is then redirected by the chopper and is sent to the brake resistors, also known as BR or DBR, where it is dissipated into heat. When the overvoltage protection is activated, energy is also dissipated in these resistors.

Insulation class and thermal power (permanent and instantaneous) in these resistors are the most important parameters that should be taken into account when designing.

JDEVS is able to design and manufacture brake resistors in different power ranges and corresponded to the standard voltage levels in the train, i.e. 750VDC and 1500VDC. These resistors are capable to dissipate the reversed energy of two or four traction motors. It should be noted that their cooling system can be natural or forced air.

Due to the multiplicity of train equipment as well as the need to establish communication between them and the exchange of information between units, the train control and management system (TCMS) is formed. The core of the TCMS is called the Vehicle Control Unit (VCU), which includes train control algorithms. TCMS is also responsible for communicating between wagons and various equipment and also monitoring them.

In general, the roles and responsibilities of TCMS are: The main and central controller of the train, and Communication and supervision of all train units.

Vehicle Control Unit is the main control system that controls all intelligent units in the vehicle. It is responsible for control, measuring, sequencing, protection, supervision and communication.

Some of the basic tasks of VCU are: Control of train propulsion and braking, Control of auxiliary converters and battery chargers, Monitoring and driver-assistance systems, Maintenance diagnosis and assistance system, Communication with control system via MVB, ETB, CAN and other communication buses, and Integration of signaling systems which are required for train operations and communication components in order to provide a comprehensive train control system

The national metro train project provided the opportunity to form a complete supply chain for the design and produce of gearboxes in the country. The acquired knowledge in this project has paved the way for our company to manufacture most types of gearboxes and couplings used in this industry.

As well as producing gearboxes and couplings, no-load test equipment with suitable mechanical loads were also provided so that the gearboxes and couplings could be tested.