Background: The Main Cooler Storage Ring at Heavy Ion Research Facility in Lanzhou (HIRFL-CSRm) has 30 power supplies for the quadrupole magnets

with a big volume of 1 000 mm×1 000 mm×2 000 mm. Purpose: We attempt to significantly reduce the size of the equipment and improve the integration of the components and power density of the power supply. Methods: Firstly

a suitable and original topology is selected for overall design. Through changing the construction of the parts of the rectifier filter

power converter

high-frequency filter and the controller

digitalization

modularization and standardization were applied to reduce the costs and the geometric dimension. Thermal simulation of the power unit was performed before the prototype is completed

and the Electro Magnetic Compatibility (EMC) was tested finally. Results: The size of new designed power supply was decreased to 600 mm×800 mm×1800 mm

and the performance testing results satisfied all of the design requirements. Conclusion: The modularized design of high power pulsed power supply not only reduce the geometric volume

increasing its power density

but also improve its overall performance

proving a feasible and meaningful reference for high power density equipment. Abstract