摘要:
One of the purpose is to obtain a motor drive circuit and an outdoor unit for an air conditioner using the same, which can flexibly support change of a model at a low price and in a small lot without using unnecessary materials, wherein a stress in a soldering part due to self-heating is low, a solder reliability is high, and design constraints are small, while maintaining a low-noise and low-loss power wiring due to lowering inductance. The motor drive circuit according to the present invention, for driving the motor using the converter circuit and the inverter circuit, whereon electronic components making up a converter circuit and an inverter circuit are mounted, which includes a lead frame molded board 100 wherein metal plate leads 37 are molded with a mold resin 36, and a single-sided printed circuit board 31 for a control circuit, and wherein power terminals 30 of the electronic components are connected to the lead frame molded board 100, and control wiring terminals 39 of the electronic components are connected to the single-sided printed circuit board 31.
摘要:
A chip resistor (30) includes a substantially rectangular substrate (32) of an insulating material having opposed substantially flat top and bottom surfaces (34, 36) and edges (38) extending between the top and bottom surfaces (34, 36). A layer (40) of a resistance material is on the top surface (34) of the substrate (32). Separate termination layers (42, 44) of a conductive material are on the top surface (34) of the substrate (30) and contact the resistance layer (40) at opposite end thereof. Each of the termination layers (42, 44) extends across an edge of the substrate and over a portion of the bottom surface (36) of the substrate (30). The total area of the portions (42b, 44b) of the termination layers (42, 44) on the bottom surface (36) of the substrate (30) is greater than the total area of the portions (42a, 44a) of the termination layers (42, 44) on the top surface (34) of the substrate (30) so that the spacing between the ends of the portions (42b, 44b) of the termination layers (42, 44) on the bottom surface (36) of the substrate (30) is smaller than the spacing between the ends of the portions (42a, 44a) of the termination layers (42, 44) on the top surface (34) of the substrate (30).
摘要:
An electrical device which comprises first and second laminar electrodes and a laminar PTC resistive element sandwiched between them, the device comprising
(a) a main portion which comprises a main part of the first electrode, a main part of the second electrode, and a main part of the resistive element; and (b) a first connection leg which extends away from the main portion and which comprises a first leg part of the first electrode which is integral with the main part of the first electrode, and a first leg part of the resistive element which is integral with the main part of the resistive element. Such devices can be secured to circuit boards in a variety of ways, and to elastically deformed terminals.
摘要:
Eine Bauteileanordnung für eine Steuerschaltung, insbesondere zur Steuerung elektrischer Antriebe, umfasst eine Leiterplatte (2) mit wenigstens einer Leiterbahn (3) und wenigstens ein auf der Leiterplatte angeordnetes elektrisches Bauteil (1). Das wenigstens eine Bauteil (1) ist auf einer Seite der Leiterbahn (3) auf der Leiterplatte (2) vorgesehen und weist zwei Anschlussleitungen (7a, 7b) auf, die durch Durchgänge (8a, 8b) in der Leiterplatte (2) ragen. Wenigstens eine der Anschlussleitungen (7a) ist mittels einer Kontaktstelle (11a) mit der Leiterbahn (3) leitend verbunden, die auf der gegenüberliegenden Seite der Leiterbahn vorgesehen. Ein elektrischer Antriebsmotor (20) verwendet eine Steuerschaltung mit einer solchen Bauteileanordnung zur elektronischen Kommutierung.
摘要:
One of the purpose is to obtain a motor drive circuit and an outdoor unit for an air conditioner using the same, which can flexibly support change of a model at a low price and in a small lot without using unnecessary materials, wherein a stress in a soldering part due to self-heating is low, a solder reliability is high, and design constraints are small, while maintaining a low-noise and low-loss power wiring due to lowering inductance. The motor drive circuit according to the present invention, for driving the motor using the converter circuit and the inverter circuit, whereon electronic components making up a converter circuit and an inverter circuit are mounted, which includes a lead frame molded board 100 wherein metal plate leads 37 are molded with a mold resin 36, and a single-sided printed circuit board 31 for a control circuit, and wherein power terminals 30 of the electronic components are connected to the lead frame molded board 100, and control wiring terminals 39 of the electronic components are connected to the single-sided printed circuit board 31.
摘要:
An electrical device which comprises first and second laminar electrodes and a laminar PTC resistive element sandwiched between them, the device comprising
(a) a main portion which comprises a main part of the first electrode, a main part of the second electrode, and a main part of the resistive element; and (b) a first connection leg which extends away from the main portion and which comprises a first leg part of the first electrode which is integral with the main part of the first electrode, and a first leg part of the resistive element which is integral with the main part of the resistive element. Such devices can be secured to circuit boards in a variety of ways, and to elastically deformed terminals.
摘要:
Laminar electrical devices, in particular circuit protection devices, contain two laminar electrodes, with a PTC element between them, and a cross-conductor which passes through the thickness of the device and contacts one only of the two electrodes. This permits connection to both electrodes from the same side of the device. It also makes it possible to carry out the steps for preparing such devices on an assembly which corresponds to a number of individual devices, with division of the assembly as the final step.
摘要:
A semiconductor device comprises a first and a second semiconductor chip that are separate from each other, a first resin package body for accomodating said first semiconductor chip and a second resin package body for accomodating said second semiconductor chip. Each of the resin package bodies comprises groups of interconnection leads at the lower edge thereof and a heat dissipation lead connecting the first resin package body and the second resin package body with each other. The heat sink part is projecting outwardly from the top edge of the first and second resin package body so as to bridge and connect the first and second resin package bodies. The semiconductor device is held upright on a substrate and is suitable for the mounting on the substrate by the surface mounting technology. Simultaneously, the device achieves an efficient cooling by the heat sink part that connects the first and second resin package bodies.