Mitsubishi Electric Corporation

Takashi Miyasaka

Yudai Yoneoka

Norihiko Akashi

Yoshiaki Irifune

Satoshi Ohdaira

Shinichi Kato

Hiroyuki Ono

Tetsuya Okuda

Yoshinao Tatei

Yasuhiro Endo

Nobuyuki Haruna

Takashi Aoki

Daisuke Koyama

Hiroshi Mihara

Satoshi Akatsuka

Shimpei Kasahara

A printed board including an external interface, a frame ground trace electrically connected to the external interface, a circuit member spaced from the frame ground trace, and a resonance trace disposed between the frame ground trace and the circuit member with a gap present between the resonance trace and the frame ground trace. The resonance trace is connected to the circuit member at at least two positions. The resonance trace and the circuit member together form a loop member configured in the form of a closed circuit of the resonance trace and the circuit member.

Printed board

A printed circuit substrate includes a circuit unit, a first main frame ground interconnection, a first sub frame ground interconnection spaced away from the first main frame ground interconnection in a first direction, and a first conductive via connecting the first main frame ground interconnection and the first sub frame ground interconnection to each other. In plan view from the first direction, a second outer periphery of the first sub frame ground interconnection is surrounded by a first outer periphery of the first main frame ground interconnection. Thus, a printed circuit substrate that can prevent the circuit unit from malfunctioning can be provided.

Printed circuit substrate

Servo amplifier

A PN-busbar common system includes motor drive devices for a plurality of motors, each of which is supplied with power from a common PN-busbar, where the motor drive devices individually drive the corresponding motors. Each of the motor drive devices executes a regenerative control on a basis of a regenerative-control start voltage, and controls to stop the regenerative control on a basis of a regenerative-control stop voltage, and also individually calculates a regenerative load ratio to control to enable or disable the regenerative control on a basis of a result of a comparison between a calculated regenerative load ratio and a set regeneration-capable load ratio.

PN-busbar common system, regenerative control device, and regenerative control method

Growing community of inventors

Chiyoda-ku, Japan

Takashi Miyasaka