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GB/T 28868-2012: Dimensions of uncoated ring cores of magnetic oxides
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 28868-2012 | English | 169 |
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Dimensions of uncoated ring cores of magnetic oxides
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GB/T 28868-2012
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Basic data | Standard ID | GB/T 28868-2012 (GB/T28868-2012) | | Description (Translated English) | Dimensions of uncoated ring cores of magnetic oxides | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | L19 | | Classification of International Standard | 29.100.10 | | Word Count Estimation | 7,764 | | Quoted Standard | GB/T 20874-2007; SJ/T 10213-1991 | | Adopted Standard | IECTR 61604-1997, NEQ | | Regulation (derived from) | National Standards Bulletin 2012 No. 28 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the uncoated ring core dimensions and their effective parameters. This standard applies to uncoated ring core. The core is mainly used for power chokes and driver transformers, pulse and broadband transformers, EMI suppression: dif | GB/T 28868-2012: Dimensions of uncoated ring cores of magnetic oxides---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Dimensions of uncoated ring cores of magnetic oxides
ICS 29.100.10
L19
National Standards of People's Republic of China
Uncoated annular magnetic oxide core size
(IEC /T R61604.1997, NEQ)
Issued on. 2012-11-05
2013-02-15 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
The Standard and IEC /T R61604.1997 "uncoated annular magnetic oxide core size" non-equivalent,
The main differences are as follows.
--- Delete Europe, Japan, the United States three different series of dimensions, effective parameters, size ratio, Ae and μ0/C1 curve, and with
- Dimensions of the universal application instead.
--- Remove the "ring core insulation breakdown voltage measuring method" This informative appendix.
--- Increased annular core core model name.
The standard proposed by the Ministry of Industry and Information Technology of the People's Republic of China.
This standard by the national magnetic components and ferrite materials Standardization Technical Committee (SAC/TC89) centralized.
This standard was drafted. Electronic Co., Ltd. Zhejiang days.
The main drafters of this standard. Panjin Xing, Zhang Rui standard, Kim Joo segment, Lucheng Song, Tang Jie.
Uncoated annular magnetic oxide core size
1 Scope
This standard specifies the dimensions and parameters effective uncoated annular core.
This standard applies to uncoated ring core. The core is mainly used for power choke and drive transformers, pulse and broadband transformers
Devices, EMI suppression. differential and common mode chokes.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 20874-2007 calculation of the magnetic component of the effective parameters (IEC 60205.2001, IDT)
SJ/T 10213-1991 ferrite material grades and element type designation
3 Requirements
3.1 core model named
Core model name should be consistent with SJ/T 10213-1991 requirements.
Complete model core materials used by the core brands and core specification model composition, for example.
R5k
Representative material grades
On behalf of the annular core
18 × 8 × 5
Core dimensions (diameter × inner diameter × height)
3.2 ratio
For a coil wound on the core, fixing the total volume constant, the DC resistance Rdc and winding inductance L ratio Rdc/L and
Words, there is an optimal ratio of diameter, height and diameter. The recommended standard size is as follows.
--- Outer and inner diameter ratio. D/d = 1.67;
--- Height than the inner diameter. h/d = 0.67.
3.3 core ratio
Ring core shape is shown in Figure 1. Each core size ratio shown in Table 1.
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