jamg中solver calculation control疑问

吴永硕

看图中红框中第一项即 steady-state approximate transient analysis。它的作用是什么，为什么永磁同步电机不用勾。
第二项即time periodic explicit error correction的作用是什么。可否举例说明。

鹌鹑GG

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[Steady-State Approximate Transient Analysis]    (About this feature)
The transient state may last longer in the transient analysis of an induction motor due to eddy currents.

If a steady state approximate transient analysis is used, the calculation of the first step is performed in almost steady state, and from the second step and later a normal transient response analysis is run based on the results obtained from the first step. With this setting, the steady state can be obtained quickly.

This function is valid for the following models.

Induction motor

Transformer

Reactor



The procedure is as follows.

Select the [Steady-State Approximate Transient Analysis] check box.

Select [Stationary Device] if a model is in stationary state.
Select [Induction Motor], and then specify a value in the [Slip] box if an induction motor is analyzed.

Select the [Output 1st Step as Steady Result] check box.

The steady state result obtained from a steady-state approximate transient analysis is outputted when the [Output 1st Step as Steady Result] check box is selected.

The transient state result obtained from a steady-state approximate Transient Analysis is outputted when the [Output 1st Step as Steady Result] check box is not selected.

Select the [Set pseudo steady state frequency] check box, and then specify a value in the box when the sinusoidal function that is time dependent is not used on a power source.

Time Periodic Explicit Error Correction   (About this feature)
The time periodic explicit error correction function reduces the time to reach steady state by removing errors in an answer for each period or half period that is specified.

The time periodic explicit error correction function is less effective for an analysis using a current condition or current source component as a power supply.



This function is valid for the following models.

Induction motor, synchronous motor, reactor, and switching transformer with voltage source



Specify the following settings.

Setting
Description

Periodic/Anti-periodic
Select [Periodic] when correcting a 1-period and [Anti-periodic] when correcting a half period.

Always select [Anti-periodic] if the analysis is antiperiodic.

This function is less effective when [Periodic] is selected.

Use reverse correction type for the rotor
Reverses periodicity for rotor.

For example, the stator is calculated as antiperiodic and the rotor is calculated as periodic when [Anti-Periodic] is specified and the [Use reverse correction type for the rotor] check box is selected.

[Reverse Correction Type for the Rotor] is not selected as default.

Use relaxation factor
Select the [Use Relaxation Factor] check box when conducting a correction.

This is selected by default.

Correction Frequency/Correction Interval
The frequency or the interval can be selected as a periodic method.

Specify the frequencies or time step for a 1-period by selecting [Periodic] and [Anti-periodic] for a half period.



Max. Corrections
Specify the maximum number of corrections to be run.

Specify the numbers from 0 to 10.

Corrects the error until the analysis is over when the value is zero.

吴永硕

鹌鹑GG 发表于 2014-1-3 20:36
请看HELP
[Steady-State Approximate Transient Analysis]    (About this feature)
The transient state ...

有两处实在不明白见图片。1、校正错误不是要花费时间么，为什么说减少的分析的时间呢？2、不依赖电源的正弦函数不知道什么意思？