High Voltage Power Solutions
Switchmode Capacitor Charging Supplies TDK-Lambda Americas’ ALE systems division is the oldest and most experienced designer and manufacturer of high voltage capacitor charging power supplies operating today. The wide range of output voltages (1 – 65kV) and power levels (500J/sec to 30kJ/sec) available from a single supplier is unique in the industry. ALE Capacitor charging power supplies are specifically designed to efficiently charge capacitive loads to high voltages with excellent pulse to pulse repeatability at very high repetition rates. Capacitor charging supplies differ from conventional DC supplies in that the output current is fixed and not variable, allowing the load capacitor to be charged in the fastest possible time, with no requirement for series current limiting resistors. All of ALE’s capacitor charging supplies have a fast inhibit input. This allows the user to start and stop load charging with a simple 0-10V input signal. This feature is particularly useful in repetitive discharge circuits where inhibiting the supply output current after the load has been discharged aids in switch recovery. In addition to the fast inhibit control all of the standard power supplies feature a comprehensive control interface with programming and status signals. The capacitor charging supply was originally designed to replace large command resonant charge supplies in high performance lasers. Even today the largest application for this type of supply is the laser industry. Although lasers are the largest users of capacitor charging power supplies, they also find applications in areas as diverse as medical sterilization and rock crushing. Switchmode High Voltage DC Although the ALE series of power supplies have been designed to operate as constant current capacitor charging supplies, they can be used in continuous DC applications with the addition of an external filter capacitor. When used in DC applications the ALE series can often deliver more average power, see the product details for the actual rating.
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ALE‘s Compact Turn-key High Voltage Power Solutions, build on over 20 years of sucessfully designing and delivering multi-kilowatt DC power systems to meet the demands of the most challenging applications. Our modular and scalable design approach uses multiple standard ALE 303 series 50kW power modules to deliver raw high voltage DC power for the system. The outputs of each 303 power module are combined using a simple Junction box which can also accomodate any necessary output filtering and voltage/current feedback required. The complete system and individual power module outputs are centrally controlled by a Master Controller which offers both local and remote user interfaces. The Master Controller generates all control signals required by each of the 303S power modules, and enables both local or remote user control of the system output voltage and current. The use of a multi-phase variable frequency control technique, results in low output voltage ripple without the need for large output energy storage filter capacitors. The controller interfaces to each 303 power module (or bank of 303 power modules), and to the Junction Box to provide system output voltage and current feedback, and operating status. Each Power Module comprises a single model 303S water-cooled power supply. The 303S is a proven 50kW rated DC power supply which can be offered with any output voltage between 1kV and 50kV. The total number of 303S modules required in the system is determined by the overall power requirements, with one module for every 50kW of power (one per 40kW with 400VAC input). Since the overall design is 100% scalable, there is no theoretical limit to the number of 303 supplies that can be connected in parallel, and hence very high power ultra compact systems can be built using standard modules. A Junction Box is used to combine the high voltage outputs from the individual power modules, and also serves to provide precision voltage and current feedback signals to the Master Controller. The Junction Box can also be used to house any filter or output protection components required. Filters can be as simple as a ripple reduction capacitor, or more complex multi-stage LC filter when ultra-low stored energy and ripple are required. The modular design approach enables TDK-Lambda to offer Compact Turnkey power systems with average output powers from as little as 60kW, to over 1MW using the same basic proven building blocks. This enables rapid delivery at a cost effective price. The image above shows an example of a 300kW power system comprising six power modules, a master controller, and junction box. Typical mechanical parameters are shown below. Contact Wim Van Hoof at Air-Parts to discuss your requirements in more detail 0172-422455.
01-01-2012
