Bidirectional conversion energy storage

What are the applications of bi-directional converters?

Applications of bi-directional converters 1.1. Power storage applications 1.2. EV charger applications Bi-directional topologies and associated reference designs 2.1. DC/DC topologies 2.1.1. Active clamp current fed full-bridge 2.1.2. DAB 2.1.3. Fixed frequency LLC 2.1.4. Phase shift LLC 2.2. AC/DC topologies

How efficient is a bidirectional DC–DC converter based on VM?

Ref. proposed a bidirectional DC–DC converter based on VM with wide voltage conversion range and common ground structure. The prototype maximum efficiency was 94.45% and 94.39%, respectively.

What is a bidirectional power flow converter?

Such a converter must have bidirectional power flow capability with flexible control in all operating modes. In HEV applications, BDCs are required to link different dc voltage buses and transfer energy between them. For example, a BDC is used to exchange energy between main batteries (200-300V) and the drive motor with 500V dc link.

Do DC-AC converters have bidirectional energy transfer capability?

As energy transfer in either direction is required for the system, each dc-ac converter must also have bidirectional energy transfer capability. With the same token, the dc buses in this structure must also be able to either generate or absorb energy.

What is the difference between unidirectional and bidirectional DC–DC converter?

The unidirectional DC–DC converter realizes voltage matching and power decoupling between FC and DC bus . The bidirectional DC–DC converter realizes voltage matching between SC and DC bus, and bidirectional flow of instantaneous energy. HESS for PHEV is shown in Fig. 1 (b) .

Does a bidirectional quasi-Z source converter have a high voltage conversion ratio?

The bidirectional quasi-Z source converter has the same voltage conversion ratio as the Z source converter. In theory, high voltage conversion ratio can be obtained when the duty cycle is close to 0.5, which avoids the decrease of conversion efficiency caused by parasitic parameters under the extreme duty cycle.