Hitachi AN091802-1 instruction manual Powering Inverters from DC, Connection method

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Powering Inverters from DC

It is possible to power inverters from a DC Power source, or to connect the DC Bus of multiple inverters together to achieve energy savings, since inverters in power driving mode can use power from those that are in regeneration mode.

[1] Connection method

There are several ways for DC bus connection of the inverters. (Examples of 3-phase 200V or 400V class inverter.)

Case 1 : Connected in parallel to a common DC bus

Case 2 : Connected in parallel to an A-fed inverter

 

 

 

 

 

DC power

AC power

supply

supply

 

INV #1

 

M 1

 

INV #2

+INV #1

-

INV #2

M 1

M 2

M 2

INV #n

INV #n

M n

M n

Case 3 : AC & DC Connected together

AC power supply

+

INV #1

 

-

INV #2

 

DC supply connection methods

 

+

INV

 

 

M 1

 

M

 

-

 

ŒConnecting to + and - terminal

M 2

INV #n

M n

+

INV

 

 

M

-

 

Connecting to AC inputs and - terminal

ØAdvantage and disadvantages of each connection method.

Item

Contents

 

Advantage

Disadvantage

Œ

Connecting to + & - terminal

Ÿ

No concern for the

Ÿ There will be no inrush

 

 

 

rectifier bridge diodes.

current limiting.

Connecting to AC inputs and - terminal

Ÿ

Integrated inrush current

Ÿ Rectifier bridge diodes

 

 

 

limiting circuit is used.

of the main inverter may

 

 

 

 

need to be up-sized.

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Contents Application Note Powering Inverters from a DC Supply Powering Inverters from DC Connection methodDC voltage to be supplied Case 1 Connected parallel to a common DC netRectifier bridge of this inverter. *2

AN091802-1 specifications

The Hitachi AN091802-1 is a high-performance semiconductor device recognized for its versatile applications in various electronic systems. This integrated circuit (IC) is predominantly used in power management and control systems, making it a critical component in modern electronic designs.

One of the main features of the AN091802-1 is its exceptional energy efficiency. It employs advanced power management technologies that allow devices to operate with minimal power wastage, making it an ideal choice for battery-operated devices and renewable energy systems. With a low quiescent current, the IC ensures longevity and reliability, especially in applications where power conservation is paramount.

In terms of its performance characteristics, the AN091802-1 boasts a wide input voltage range. This versatility permits compatibility with numerous voltage supply scenarios, expanding its usability in various applications, from consumer electronics to industrial equipment. Additionally, the IC supports high switching frequencies, which enhances its responsiveness and efficiency in power conversion tasks.

The Hitachi AN091802-1 integrates several protection features that promote safe operation. These include over-voltage protection, under-voltage lockout, and thermal shutdown capabilities. These built-in safeguards are essential in preventing damage to the IC and the systems in which it is deployed, thereby enhancing overall system reliability.

Another key aspect of the AN091802-1 is its compact packaging. The design minimizes space requirements on PCBs, allowing for more efficient layouts. This compactness is particularly advantageous in applications where size is a constraint, such as wearable technology and portable devices.

Moreover, the IC employs advanced analog and digital control technologies which enable precise regulation and monitoring of output parameters. This level of control is vital in applications requiring stringent performance criteria and enhances the overall functionality of the electronic systems.

In summary, the Hitachi AN091802-1 is a feature-rich integrated circuit known for its energy efficiency, versatile voltage compatibility, robust protection mechanisms, and space-saving design. Its advanced technologies make it a reliable and effective component for various electronic applications, reflecting Hitachi's commitment to innovation in semiconductor solutions.